./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 624e111eb11fc6cb53be17248f0e61e18bd8cc958dfb511134351ecf4f085f78 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 19:43:38,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:43:38,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:43:38,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:43:38,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:43:38,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:43:38,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:43:38,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:43:38,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:43:38,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:43:38,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:43:38,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:43:38,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:43:38,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:43:38,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:43:38,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:43:38,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:43:38,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:43:38,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:43:38,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:43:38,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:43:38,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:43:38,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:43:38,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:43:38,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:43:38,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:43:38,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:43:38,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:43:38,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:43:38,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:43:38,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:43:38,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:43:38,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:43:38,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:43:38,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:43:38,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:43:38,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:43:38,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:43:38,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:43:38,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:43:38,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:43:38,181 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-18 19:43:38,223 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:43:38,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:43:38,224 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:43:38,224 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:43:38,225 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:43:38,225 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:43:38,226 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:43:38,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:43:38,226 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:43:38,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:43:38,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:43:38,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:43:38,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:43:38,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:43:38,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:43:38,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:43:38,229 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:43:38,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:43:38,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:43:38,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:43:38,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:43:38,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:43:38,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:43:38,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:43:38,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:43:38,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:43:38,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:43:38,243 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:43:38,243 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:43:38,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:43:38,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 624e111eb11fc6cb53be17248f0e61e18bd8cc958dfb511134351ecf4f085f78 [2022-11-18 19:43:38,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:43:38,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:43:38,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:43:38,546 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:43:38,550 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:43:38,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i [2022-11-18 19:43:38,625 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/data/fe846195d/e02c814061074901875e9509d67517e0/FLAG2f9bbea16 [2022-11-18 19:43:39,526 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:43:39,526 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i [2022-11-18 19:43:39,589 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/data/fe846195d/e02c814061074901875e9509d67517e0/FLAG2f9bbea16 [2022-11-18 19:43:39,961 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/data/fe846195d/e02c814061074901875e9509d67517e0 [2022-11-18 19:43:39,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:43:39,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:43:39,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:43:39,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:43:39,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:43:39,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:43:39" (1/1) ... [2022-11-18 19:43:39,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e0a329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:43:39, skipping insertion in model container [2022-11-18 19:43:39,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:43:39" (1/1) ... [2022-11-18 19:43:39,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:43:40,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:43:40,439 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4495,4508] [2022-11-18 19:43:40,447 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4555,4568] [2022-11-18 19:43:41,379 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:41,381 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:41,385 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:41,387 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:41,389 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:41,416 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:41,416 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:41,418 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:41,419 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:41,865 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-18 19:43:41,866 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-18 19:43:41,867 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-18 19:43:41,868 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-18 19:43:41,870 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-18 19:43:41,871 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-18 19:43:41,871 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-18 19:43:41,872 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-18 19:43:41,873 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-18 19:43:41,873 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-18 19:43:42,049 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-18 19:43:42,196 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:42,196 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:42,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:43:42,402 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:43:42,433 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4495,4508] [2022-11-18 19:43:42,434 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4555,4568] [2022-11-18 19:43:42,500 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:42,501 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:42,502 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:42,503 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:42,505 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:42,523 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:42,526 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:42,528 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:42,529 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:42,589 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-18 19:43:42,590 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-18 19:43:42,591 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-18 19:43:42,592 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-18 19:43:42,596 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-18 19:43:42,597 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-18 19:43:42,597 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-18 19:43:42,598 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-18 19:43:42,599 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-18 19:43:42,601 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-18 19:43:42,633 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-18 19:43:42,701 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:42,701 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 19:43:42,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:43:43,081 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:43:43,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:43:43 WrapperNode [2022-11-18 19:43:43,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:43:43,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:43:43,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:43:43,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:43:43,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:43:43" (1/1) ... [2022-11-18 19:43:43,222 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:43:43" (1/1) ... [2022-11-18 19:43:43,312 INFO L138 Inliner]: procedures = 691, calls = 2618, calls flagged for inlining = 62, calls inlined = 9, statements flattened = 855 [2022-11-18 19:43:43,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:43:43,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:43:43,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:43:43,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:43:43,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:43:43" (1/1) ... [2022-11-18 19:43:43,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:43:43" (1/1) ... [2022-11-18 19:43:43,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:43:43" (1/1) ... [2022-11-18 19:43:43,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:43:43" (1/1) ... [2022-11-18 19:43:43,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:43:43" (1/1) ... [2022-11-18 19:43:43,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:43:43" (1/1) ... [2022-11-18 19:43:43,376 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:43:43" (1/1) ... [2022-11-18 19:43:43,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:43:43" (1/1) ... [2022-11-18 19:43:43,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:43:43,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:43:43,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:43:43,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:43:43,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:43:43" (1/1) ... [2022-11-18 19:43:43,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:43:43,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:43:43,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:43:43,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:43:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-18 19:43:43,511 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-18 19:43:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:43:43,512 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-18 19:43:43,512 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-18 19:43:43,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:43:43,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 19:43:43,513 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 19:43:43,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 19:43:43,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:43:43,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 19:43:43,515 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2022-11-18 19:43:43,515 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2022-11-18 19:43:43,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:43:43,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:43:43,516 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-18 19:43:43,516 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-18 19:43:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-11-18 19:43:43,517 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-11-18 19:43:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 19:43:43,517 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 19:43:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2022-11-18 19:43:43,517 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2022-11-18 19:43:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:43:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 19:43:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2022-11-18 19:43:43,518 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2022-11-18 19:43:43,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-18 19:43:43,519 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-18 19:43:43,519 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-18 19:43:43,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:43:43,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:43:43,881 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:43:43,884 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:43:45,291 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:43:45,301 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:43:45,301 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 19:43:45,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:43:45 BoogieIcfgContainer [2022-11-18 19:43:45,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:43:45,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:43:45,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:43:45,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:43:45,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:43:39" (1/3) ... [2022-11-18 19:43:45,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210b5d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:43:45, skipping insertion in model container [2022-11-18 19:43:45,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:43:43" (2/3) ... [2022-11-18 19:43:45,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210b5d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:43:45, skipping insertion in model container [2022-11-18 19:43:45,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:43:45" (3/3) ... [2022-11-18 19:43:45,315 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_u8_harness.i [2022-11-18 19:43:45,335 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:43:45,335 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:43:45,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:43:45,429 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@119bef0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:43:45,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 19:43:45,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 86 states have internal predecessors, (105), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-18 19:43:45,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-18 19:43:45,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:43:45,447 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:43:45,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:43:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:43:45,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1647877052, now seen corresponding path program 1 times [2022-11-18 19:43:45,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:43:45,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062955256] [2022-11-18 19:43:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:43:45,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:43:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:46,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:43:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:46,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:43:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:46,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:43:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:46,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:43:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:46,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:43:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:46,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 19:43:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:46,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 19:43:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:46,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-18 19:43:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:46,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-18 19:43:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:46,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 19:43:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:46,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 19:43:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:46,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 19:43:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-18 19:43:46,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:43:46,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062955256] [2022-11-18 19:43:46,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062955256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:43:46,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:43:46,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:43:46,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054278444] [2022-11-18 19:43:46,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:43:46,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:43:46,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:43:46,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:43:46,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:43:46,475 INFO L87 Difference]: Start difference. First operand has 131 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 86 states have internal predecessors, (105), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 19:43:46,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:43:46,993 INFO L93 Difference]: Finished difference Result 258 states and 367 transitions. [2022-11-18 19:43:46,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:43:46,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 85 [2022-11-18 19:43:46,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:43:47,012 INFO L225 Difference]: With dead ends: 258 [2022-11-18 19:43:47,012 INFO L226 Difference]: Without dead ends: 126 [2022-11-18 19:43:47,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:43:47,034 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 75 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:43:47,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 115 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:43:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-18 19:43:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-18 19:43:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 82 states have internal predecessors, (98), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-18 19:43:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 165 transitions. [2022-11-18 19:43:47,125 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 165 transitions. Word has length 85 [2022-11-18 19:43:47,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:43:47,126 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 165 transitions. [2022-11-18 19:43:47,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 19:43:47,127 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 165 transitions. [2022-11-18 19:43:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-18 19:43:47,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:43:47,140 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:43:47,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:43:47,141 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:43:47,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:43:47,146 INFO L85 PathProgramCache]: Analyzing trace with hash -905040328, now seen corresponding path program 1 times [2022-11-18 19:43:47,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:43:47,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088098491] [2022-11-18 19:43:47,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:43:47,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:43:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:48,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:43:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:48,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:43:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:48,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:43:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:48,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:43:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:48,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:43:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:48,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 19:43:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:48,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 19:43:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:48,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-18 19:43:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:48,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-18 19:43:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:48,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 19:43:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:48,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 19:43:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:48,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 19:43:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-18 19:43:48,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:43:48,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088098491] [2022-11-18 19:43:48,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088098491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:43:48,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617078861] [2022-11-18 19:43:48,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:43:48,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:43:48,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:43:48,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:43:48,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:43:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:48,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 2595 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:43:48,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:43:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-18 19:43:49,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:43:49,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617078861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:43:49,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:43:49,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-18 19:43:49,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456043987] [2022-11-18 19:43:49,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:43:49,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:43:49,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:43:49,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:43:49,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:43:49,068 INFO L87 Difference]: Start difference. First operand 126 states and 165 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-18 19:43:49,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:43:49,330 INFO L93 Difference]: Finished difference Result 230 states and 309 transitions. [2022-11-18 19:43:49,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:43:49,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 85 [2022-11-18 19:43:49,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:43:49,334 INFO L225 Difference]: With dead ends: 230 [2022-11-18 19:43:49,334 INFO L226 Difference]: Without dead ends: 129 [2022-11-18 19:43:49,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:43:49,336 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 193 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:43:49,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 468 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:43:49,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-18 19:43:49,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-18 19:43:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 85 states have internal predecessors, (100), 34 states have call successors, (34), 10 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2022-11-18 19:43:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 171 transitions. [2022-11-18 19:43:49,355 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 171 transitions. Word has length 85 [2022-11-18 19:43:49,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:43:49,355 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 171 transitions. [2022-11-18 19:43:49,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-18 19:43:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 171 transitions. [2022-11-18 19:43:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-18 19:43:49,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:43:49,358 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:43:49,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:43:49,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:43:49,568 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:43:49,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:43:49,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1139705187, now seen corresponding path program 1 times [2022-11-18 19:43:49,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:43:49,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425013211] [2022-11-18 19:43:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:43:49,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:43:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:50,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:43:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:50,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:43:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:50,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:43:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:50,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:43:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:50,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:43:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:50,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 19:43:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:50,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-18 19:43:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:50,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:43:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:50,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 19:43:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:50,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 19:43:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:50,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 19:43:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:50,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-18 19:43:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-18 19:43:50,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:43:50,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425013211] [2022-11-18 19:43:50,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425013211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:43:50,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691801780] [2022-11-18 19:43:50,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:43:50,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:43:50,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:43:50,412 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:43:50,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:43:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:50,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 2612 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 19:43:50,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:43:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-18 19:43:51,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:43:51,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691801780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:43:51,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:43:51,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-18 19:43:51,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611677765] [2022-11-18 19:43:51,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:43:51,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:43:51,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:43:51,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:43:51,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:43:51,162 INFO L87 Difference]: Start difference. First operand 129 states and 171 transitions. Second operand has 7 states, 6 states have (on average 8.166666666666666) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-18 19:43:51,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:43:51,418 INFO L93 Difference]: Finished difference Result 225 states and 300 transitions. [2022-11-18 19:43:51,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:43:51,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.166666666666666) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 91 [2022-11-18 19:43:51,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:43:51,421 INFO L225 Difference]: With dead ends: 225 [2022-11-18 19:43:51,422 INFO L226 Difference]: Without dead ends: 129 [2022-11-18 19:43:51,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:43:51,423 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 209 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:43:51,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 471 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:43:51,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-18 19:43:51,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-18 19:43:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 85 states have internal predecessors, (100), 34 states have call successors, (34), 10 states have call predecessors, (34), 11 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2022-11-18 19:43:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2022-11-18 19:43:51,455 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 91 [2022-11-18 19:43:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:43:51,456 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2022-11-18 19:43:51,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.166666666666666) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-18 19:43:51,456 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2022-11-18 19:43:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-18 19:43:51,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:43:51,458 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:43:51,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:43:51,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:43:51,669 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:43:51,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:43:51,670 INFO L85 PathProgramCache]: Analyzing trace with hash 928728782, now seen corresponding path program 2 times [2022-11-18 19:43:51,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:43:51,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520908386] [2022-11-18 19:43:51,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:43:51,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:43:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:52,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:43:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:52,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:43:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:52,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:43:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:52,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:43:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:52,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:43:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:52,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 19:43:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:52,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-18 19:43:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:52,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-18 19:43:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:52,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 19:43:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:52,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 19:43:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:52,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 19:43:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:52,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 19:43:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-18 19:43:52,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:43:52,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520908386] [2022-11-18 19:43:52,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520908386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:43:52,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722420565] [2022-11-18 19:43:52,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:43:52,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:43:52,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:43:52,558 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:43:52,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:43:53,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:43:53,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:43:53,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 2629 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 19:43:53,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:43:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-18 19:43:53,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:43:53,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722420565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:43:53,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:43:53,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2022-11-18 19:43:53,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853068166] [2022-11-18 19:43:53,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:43:53,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:43:53,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:43:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:43:53,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:43:53,804 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-18 19:43:54,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:43:54,013 INFO L93 Difference]: Finished difference Result 220 states and 291 transitions. [2022-11-18 19:43:54,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:43:54,013 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 97 [2022-11-18 19:43:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:43:54,015 INFO L225 Difference]: With dead ends: 220 [2022-11-18 19:43:54,015 INFO L226 Difference]: Without dead ends: 126 [2022-11-18 19:43:54,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:43:54,017 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 79 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:43:54,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 890 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:43:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-18 19:43:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-18 19:43:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 82 states have internal predecessors, (97), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-18 19:43:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 164 transitions. [2022-11-18 19:43:54,031 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 164 transitions. Word has length 97 [2022-11-18 19:43:54,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:43:54,032 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 164 transitions. [2022-11-18 19:43:54,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-18 19:43:54,032 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 164 transitions. [2022-11-18 19:43:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-18 19:43:54,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:43:54,034 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:43:54,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:43:54,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:43:54,244 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:43:54,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:43:54,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1868612388, now seen corresponding path program 1 times [2022-11-18 19:43:54,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:43:54,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768167367] [2022-11-18 19:43:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:43:54,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:43:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:55,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:43:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:55,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:43:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:55,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:43:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:55,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:43:55,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:55,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:43:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:55,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 19:43:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:55,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-18 19:43:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:55,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-18 19:43:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:55,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 19:43:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:55,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 19:43:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:55,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 19:43:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:55,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 19:43:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:55,432 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-18 19:43:55,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:43:55,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768167367] [2022-11-18 19:43:55,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768167367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:43:55,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:43:55,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 19:43:55,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492172279] [2022-11-18 19:43:55,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:43:55,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 19:43:55,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:43:55,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 19:43:55,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:43:55,435 INFO L87 Difference]: Start difference. First operand 126 states and 164 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-18 19:43:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:43:56,239 INFO L93 Difference]: Finished difference Result 138 states and 181 transitions. [2022-11-18 19:43:56,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:43:56,240 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2022-11-18 19:43:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:43:56,242 INFO L225 Difference]: With dead ends: 138 [2022-11-18 19:43:56,242 INFO L226 Difference]: Without dead ends: 136 [2022-11-18 19:43:56,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-18 19:43:56,243 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 104 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:43:56,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 447 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 19:43:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-18 19:43:56,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-11-18 19:43:56,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 89 states have internal predecessors, (103), 35 states have call successors, (35), 11 states have call predecessors, (35), 12 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2022-11-18 19:43:56,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 178 transitions. [2022-11-18 19:43:56,256 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 178 transitions. Word has length 109 [2022-11-18 19:43:56,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:43:56,257 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 178 transitions. [2022-11-18 19:43:56,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-18 19:43:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 178 transitions. [2022-11-18 19:43:56,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 19:43:56,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:43:56,259 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:43:56,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 19:43:56,259 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:43:56,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:43:56,260 INFO L85 PathProgramCache]: Analyzing trace with hash 581206572, now seen corresponding path program 1 times [2022-11-18 19:43:56,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:43:56,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890034062] [2022-11-18 19:43:56,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:43:56,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:43:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:58,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:43:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:58,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:43:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:58,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:43:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:58,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:43:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:58,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:43:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:58,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 19:43:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:58,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-18 19:43:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:58,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-18 19:43:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:58,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 19:43:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:58,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 19:43:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:58,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 19:43:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:58,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 19:43:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 42 proven. 6 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-18 19:43:58,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:43:58,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890034062] [2022-11-18 19:43:58,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890034062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:43:58,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060748125] [2022-11-18 19:43:58,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:43:58,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:43:58,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:43:58,631 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:43:58,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:43:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:59,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 2675 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 19:43:59,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:43:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-18 19:43:59,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:43:59,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060748125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:43:59,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:43:59,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2022-11-18 19:43:59,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956741671] [2022-11-18 19:43:59,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:43:59,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:43:59,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:43:59,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:43:59,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:43:59,419 INFO L87 Difference]: Start difference. First operand 135 states and 178 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-18 19:43:59,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:43:59,665 INFO L93 Difference]: Finished difference Result 263 states and 366 transitions. [2022-11-18 19:43:59,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:43:59,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 113 [2022-11-18 19:43:59,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:43:59,668 INFO L225 Difference]: With dead ends: 263 [2022-11-18 19:43:59,668 INFO L226 Difference]: Without dead ends: 153 [2022-11-18 19:43:59,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:43:59,670 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 40 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:43:59,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 556 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-18 19:43:59,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-18 19:43:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 140. [2022-11-18 19:43:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 92 states have (on average 1.1956521739130435) internal successors, (110), 94 states have internal predecessors, (110), 35 states have call successors, (35), 11 states have call predecessors, (35), 12 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2022-11-18 19:43:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2022-11-18 19:43:59,689 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 113 [2022-11-18 19:43:59,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:43:59,689 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2022-11-18 19:43:59,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-18 19:43:59,690 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2022-11-18 19:43:59,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 19:43:59,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:43:59,691 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:43:59,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:43:59,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:43:59,902 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:43:59,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:43:59,903 INFO L85 PathProgramCache]: Analyzing trace with hash 839372010, now seen corresponding path program 1 times [2022-11-18 19:43:59,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:43:59,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936236135] [2022-11-18 19:43:59,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:43:59,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:01,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:44:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:01,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:44:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:01,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:44:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:01,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:44:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:01,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:44:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:01,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 19:44:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:01,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-18 19:44:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:01,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-18 19:44:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:01,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 19:44:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:01,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 19:44:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:01,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 19:44:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:01,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 19:44:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-18 19:44:01,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:01,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936236135] [2022-11-18 19:44:01,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936236135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:44:01,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246835358] [2022-11-18 19:44:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:01,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:01,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:44:01,845 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:44:01,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:44:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:02,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 2670 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-18 19:44:02,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:02,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 19:44:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-18 19:44:03,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:44:03,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246835358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:44:03,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:44:03,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 21 [2022-11-18 19:44:03,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393426287] [2022-11-18 19:44:03,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:44:03,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:44:03,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:03,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:44:03,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-18 19:44:03,014 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-18 19:44:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:03,108 INFO L93 Difference]: Finished difference Result 278 states and 369 transitions. [2022-11-18 19:44:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:44:03,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 113 [2022-11-18 19:44:03,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:03,111 INFO L225 Difference]: With dead ends: 278 [2022-11-18 19:44:03,111 INFO L226 Difference]: Without dead ends: 159 [2022-11-18 19:44:03,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-11-18 19:44:03,113 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 26 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:03,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1021 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 81 Unchecked, 0.0s Time] [2022-11-18 19:44:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-18 19:44:03,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-11-18 19:44:03,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 110 states have (on average 1.209090909090909) internal successors, (133), 112 states have internal predecessors, (133), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2022-11-18 19:44:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 208 transitions. [2022-11-18 19:44:03,138 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 208 transitions. Word has length 113 [2022-11-18 19:44:03,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:03,138 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 208 transitions. [2022-11-18 19:44:03,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-18 19:44:03,138 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 208 transitions. [2022-11-18 19:44:03,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 19:44:03,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:03,141 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:03,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:44:03,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:03,352 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:44:03,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:03,352 INFO L85 PathProgramCache]: Analyzing trace with hash -218466068, now seen corresponding path program 1 times [2022-11-18 19:44:03,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:03,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356562632] [2022-11-18 19:44:03,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:03,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:03,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:44:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:03,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:44:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:03,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:44:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:03,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:44:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:03,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:44:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:03,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 19:44:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:03,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-18 19:44:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:03,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-18 19:44:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:03,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 19:44:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:03,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 19:44:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:03,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 19:44:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:03,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 19:44:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-18 19:44:03,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:03,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356562632] [2022-11-18 19:44:03,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356562632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:44:03,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466671383] [2022-11-18 19:44:03,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:03,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:03,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:44:03,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:44:03,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:44:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:04,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 2665 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 19:44:04,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-18 19:44:04,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:44:04,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466671383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:44:04,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:44:04,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-18 19:44:04,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039681451] [2022-11-18 19:44:04,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:44:04,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:44:04,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:04,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:44:04,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:44:04,453 INFO L87 Difference]: Start difference. First operand 159 states and 208 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 19:44:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:04,486 INFO L93 Difference]: Finished difference Result 287 states and 387 transitions. [2022-11-18 19:44:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:44:04,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 113 [2022-11-18 19:44:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:04,489 INFO L225 Difference]: With dead ends: 287 [2022-11-18 19:44:04,489 INFO L226 Difference]: Without dead ends: 168 [2022-11-18 19:44:04,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:44:04,490 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 20 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:04,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 484 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:44:04,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-18 19:44:04,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 151. [2022-11-18 19:44:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 103 states have (on average 1.203883495145631) internal successors, (124), 104 states have internal predecessors, (124), 35 states have call successors, (35), 12 states have call predecessors, (35), 12 states have return successors, (39), 34 states have call predecessors, (39), 34 states have call successors, (39) [2022-11-18 19:44:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 198 transitions. [2022-11-18 19:44:04,505 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 198 transitions. Word has length 113 [2022-11-18 19:44:04,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:04,506 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 198 transitions. [2022-11-18 19:44:04,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 19:44:04,506 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 198 transitions. [2022-11-18 19:44:04,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-18 19:44:04,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:04,508 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:04,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:44:04,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 19:44:04,718 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:44:04,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:04,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1302315312, now seen corresponding path program 2 times [2022-11-18 19:44:04,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:04,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554480113] [2022-11-18 19:44:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:04,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:05,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:44:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:05,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:44:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:05,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:44:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:05,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:44:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:05,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:44:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:05,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 19:44:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:06,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 19:44:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:06,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 19:44:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:06,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 19:44:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:06,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-18 19:44:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:06,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-18 19:44:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:06,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-18 19:44:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-18 19:44:06,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:06,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554480113] [2022-11-18 19:44:06,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554480113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:44:06,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036973349] [2022-11-18 19:44:06,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:44:06,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:06,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:44:06,074 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:44:06,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:44:07,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:44:07,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:44:07,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 2677 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 19:44:07,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 90 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 19:44:08,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:09,091 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 19:44:09,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-18 19:44:09,104 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-18 19:44:09,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-11-18 19:44:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-18 19:44:09,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036973349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:09,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:44:09,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 13] total 28 [2022-11-18 19:44:09,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742835583] [2022-11-18 19:44:09,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:09,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 19:44:09,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:09,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 19:44:09,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-11-18 19:44:09,150 INFO L87 Difference]: Start difference. First operand 151 states and 198 transitions. Second operand has 28 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 25 states have internal predecessors, (115), 5 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2022-11-18 19:44:12,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:12,439 INFO L93 Difference]: Finished difference Result 347 states and 472 transitions. [2022-11-18 19:44:12,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 19:44:12,440 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 25 states have internal predecessors, (115), 5 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 117 [2022-11-18 19:44:12,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:12,442 INFO L225 Difference]: With dead ends: 347 [2022-11-18 19:44:12,442 INFO L226 Difference]: Without dead ends: 228 [2022-11-18 19:44:12,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 235 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=514, Invalid=3392, Unknown=0, NotChecked=0, Total=3906 [2022-11-18 19:44:12,445 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 295 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 2542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 384 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:12,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 834 Invalid, 2542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2108 Invalid, 0 Unknown, 384 Unchecked, 1.7s Time] [2022-11-18 19:44:12,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-18 19:44:12,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 200. [2022-11-18 19:44:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 142 states have (on average 1.204225352112676) internal successors, (171), 145 states have internal predecessors, (171), 41 states have call successors, (41), 15 states have call predecessors, (41), 16 states have return successors, (52), 39 states have call predecessors, (52), 40 states have call successors, (52) [2022-11-18 19:44:12,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 264 transitions. [2022-11-18 19:44:12,466 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 264 transitions. Word has length 117 [2022-11-18 19:44:12,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:12,468 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 264 transitions. [2022-11-18 19:44:12,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 25 states have internal predecessors, (115), 5 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2022-11-18 19:44:12,468 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 264 transitions. [2022-11-18 19:44:12,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-18 19:44:12,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:12,472 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:12,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-18 19:44:12,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:12,682 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:44:12,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:12,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1210158377, now seen corresponding path program 1 times [2022-11-18 19:44:12,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:12,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897557028] [2022-11-18 19:44:12,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:12,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:12,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:44:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:12,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:44:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:12,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:44:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:13,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:44:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:13,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:44:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:13,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:44:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:13,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:44:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:13,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 19:44:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:13,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 19:44:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:13,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 19:44:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:13,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 19:44:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:13,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 19:44:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-18 19:44:13,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:13,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897557028] [2022-11-18 19:44:13,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897557028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:44:13,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826324193] [2022-11-18 19:44:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:13,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:13,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:44:13,118 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:44:13,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 19:44:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:13,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 2677 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 19:44:13,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-18 19:44:13,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:44:13,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826324193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:44:13,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:44:13,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-18 19:44:13,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546806418] [2022-11-18 19:44:13,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:44:13,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:44:13,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:13,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:44:13,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:44:13,726 INFO L87 Difference]: Start difference. First operand 200 states and 264 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 19:44:13,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:13,757 INFO L93 Difference]: Finished difference Result 381 states and 514 transitions. [2022-11-18 19:44:13,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:44:13,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2022-11-18 19:44:13,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:13,760 INFO L225 Difference]: With dead ends: 381 [2022-11-18 19:44:13,760 INFO L226 Difference]: Without dead ends: 211 [2022-11-18 19:44:13,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:44:13,762 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 9 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:13,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 477 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:44:13,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-18 19:44:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2022-11-18 19:44:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 144 states have (on average 1.1875) internal successors, (171), 147 states have internal predecessors, (171), 41 states have call successors, (41), 15 states have call predecessors, (41), 16 states have return successors, (52), 39 states have call predecessors, (52), 40 states have call successors, (52) [2022-11-18 19:44:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 264 transitions. [2022-11-18 19:44:13,785 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 264 transitions. Word has length 119 [2022-11-18 19:44:13,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:13,786 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 264 transitions. [2022-11-18 19:44:13,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 19:44:13,786 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 264 transitions. [2022-11-18 19:44:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-18 19:44:13,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:13,788 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:13,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 19:44:13,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 19:44:13,999 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:44:13,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:13,999 INFO L85 PathProgramCache]: Analyzing trace with hash -101760997, now seen corresponding path program 1 times [2022-11-18 19:44:14,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:14,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959767624] [2022-11-18 19:44:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:14,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:14,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:44:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:14,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:44:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:14,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:44:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:14,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:44:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:14,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:44:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:14,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:44:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:14,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:44:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:14,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 19:44:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:14,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 19:44:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:14,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 19:44:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:14,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 19:44:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:14,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 19:44:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-18 19:44:14,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:14,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959767624] [2022-11-18 19:44:14,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959767624] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:44:14,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419435491] [2022-11-18 19:44:14,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:14,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:14,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:44:14,492 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:44:14,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 19:44:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:15,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 2679 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 19:44:15,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-18 19:44:15,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:44:15,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419435491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:44:15,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:44:15,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-18 19:44:15,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745241141] [2022-11-18 19:44:15,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:44:15,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:44:15,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:15,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:44:15,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:44:15,078 INFO L87 Difference]: Start difference. First operand 202 states and 264 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 19:44:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:15,111 INFO L93 Difference]: Finished difference Result 388 states and 526 transitions. [2022-11-18 19:44:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:44:15,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2022-11-18 19:44:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:15,113 INFO L225 Difference]: With dead ends: 388 [2022-11-18 19:44:15,113 INFO L226 Difference]: Without dead ends: 216 [2022-11-18 19:44:15,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:44:15,115 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 34 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:15,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 475 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:44:15,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-18 19:44:15,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 198. [2022-11-18 19:44:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 140 states have (on average 1.1642857142857144) internal successors, (163), 143 states have internal predecessors, (163), 41 states have call successors, (41), 15 states have call predecessors, (41), 16 states have return successors, (52), 39 states have call predecessors, (52), 40 states have call successors, (52) [2022-11-18 19:44:15,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 256 transitions. [2022-11-18 19:44:15,131 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 256 transitions. Word has length 119 [2022-11-18 19:44:15,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:15,131 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 256 transitions. [2022-11-18 19:44:15,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 19:44:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 256 transitions. [2022-11-18 19:44:15,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-18 19:44:15,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:15,134 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:15,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 19:44:15,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:15,343 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:44:15,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:15,344 INFO L85 PathProgramCache]: Analyzing trace with hash -688037219, now seen corresponding path program 2 times [2022-11-18 19:44:15,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:15,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947387806] [2022-11-18 19:44:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:15,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:16,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:44:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:16,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:44:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:16,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:44:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:16,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:44:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:16,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:44:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:16,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:44:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:16,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:44:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:16,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 19:44:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:16,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 19:44:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:17,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 19:44:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:17,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 19:44:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:17,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 19:44:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-18 19:44:17,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:17,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947387806] [2022-11-18 19:44:17,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947387806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:44:17,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327809548] [2022-11-18 19:44:17,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:44:17,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:17,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:44:17,334 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:44:17,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 19:44:18,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:44:18,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:44:18,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 2674 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 19:44:18,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 19:44:19,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:20,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-18 19:44:20,574 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 19:44:20,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 24 [2022-11-18 19:44:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-18 19:44:20,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327809548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:20,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:44:20,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 13] total 31 [2022-11-18 19:44:20,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670793092] [2022-11-18 19:44:20,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:20,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 19:44:20,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:20,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 19:44:20,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-11-18 19:44:20,614 INFO L87 Difference]: Start difference. First operand 198 states and 256 transitions. Second operand has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 28 states have internal predecessors, (128), 8 states have call successors, (30), 6 states have call predecessors, (30), 5 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-11-18 19:44:25,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:25,027 INFO L93 Difference]: Finished difference Result 416 states and 558 transitions. [2022-11-18 19:44:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 19:44:25,028 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 28 states have internal predecessors, (128), 8 states have call successors, (30), 6 states have call predecessors, (30), 5 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) Word has length 119 [2022-11-18 19:44:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:25,031 INFO L225 Difference]: With dead ends: 416 [2022-11-18 19:44:25,031 INFO L226 Difference]: Without dead ends: 331 [2022-11-18 19:44:25,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 237 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=450, Invalid=2630, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 19:44:25,034 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 292 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 2751 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 3275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:25,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1099 Invalid, 3275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2751 Invalid, 0 Unknown, 423 Unchecked, 2.7s Time] [2022-11-18 19:44:25,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-18 19:44:25,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 294. [2022-11-18 19:44:25,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 215 states have (on average 1.1534883720930234) internal successors, (248), 223 states have internal predecessors, (248), 53 states have call successors, (53), 20 states have call predecessors, (53), 25 states have return successors, (86), 50 states have call predecessors, (86), 52 states have call successors, (86) [2022-11-18 19:44:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 387 transitions. [2022-11-18 19:44:25,063 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 387 transitions. Word has length 119 [2022-11-18 19:44:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:25,063 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 387 transitions. [2022-11-18 19:44:25,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 28 states have internal predecessors, (128), 8 states have call successors, (30), 6 states have call predecessors, (30), 5 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-11-18 19:44:25,064 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 387 transitions. [2022-11-18 19:44:25,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-18 19:44:25,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:25,066 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:25,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 19:44:25,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 19:44:25,277 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:44:25,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:25,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1760416737, now seen corresponding path program 1 times [2022-11-18 19:44:25,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:25,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547048504] [2022-11-18 19:44:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:25,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:26,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:44:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:26,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:44:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:26,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:44:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:26,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:44:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:26,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:44:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:26,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:44:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:26,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:44:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:26,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 19:44:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:26,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 19:44:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:26,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 19:44:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:26,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 19:44:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:26,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 19:44:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-18 19:44:27,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:27,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547048504] [2022-11-18 19:44:27,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547048504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:44:27,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052354002] [2022-11-18 19:44:27,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:27,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:27,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:44:27,083 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:44:27,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 19:44:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:27,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 2676 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-18 19:44:27,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:27,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 19:44:28,064 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:44:28,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 21 [2022-11-18 19:44:28,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-18 19:44:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 55 proven. 58 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-18 19:44:29,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:30,099 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 19:44:30,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-18 19:44:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-18 19:44:30,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052354002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:30,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:44:30,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 22, 12] total 40 [2022-11-18 19:44:30,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307280468] [2022-11-18 19:44:30,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:30,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 19:44:30,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:30,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 19:44:30,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1417, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 19:44:30,193 INFO L87 Difference]: Start difference. First operand 294 states and 387 transitions. Second operand has 40 states, 39 states have (on average 4.128205128205129) internal successors, (161), 37 states have internal predecessors, (161), 10 states have call successors, (30), 6 states have call predecessors, (30), 10 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2022-11-18 19:44:37,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:37,414 INFO L93 Difference]: Finished difference Result 683 states and 1030 transitions. [2022-11-18 19:44:37,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-18 19:44:37,415 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.128205128205129) internal successors, (161), 37 states have internal predecessors, (161), 10 states have call successors, (30), 6 states have call predecessors, (30), 10 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) Word has length 119 [2022-11-18 19:44:37,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:37,419 INFO L225 Difference]: With dead ends: 683 [2022-11-18 19:44:37,419 INFO L226 Difference]: Without dead ends: 559 [2022-11-18 19:44:37,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 237 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2207 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=847, Invalid=7709, Unknown=0, NotChecked=0, Total=8556 [2022-11-18 19:44:37,423 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 542 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 3998 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 5146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 3998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 813 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:37,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1280 Invalid, 5146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 3998 Invalid, 0 Unknown, 813 Unchecked, 4.0s Time] [2022-11-18 19:44:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-11-18 19:44:37,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 430. [2022-11-18 19:44:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 301 states have (on average 1.176079734219269) internal successors, (354), 307 states have internal predecessors, (354), 97 states have call successors, (97), 30 states have call predecessors, (97), 31 states have return successors, (148), 92 states have call predecessors, (148), 96 states have call successors, (148) [2022-11-18 19:44:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 599 transitions. [2022-11-18 19:44:37,476 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 599 transitions. Word has length 119 [2022-11-18 19:44:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:37,476 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 599 transitions. [2022-11-18 19:44:37,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.128205128205129) internal successors, (161), 37 states have internal predecessors, (161), 10 states have call successors, (30), 6 states have call predecessors, (30), 10 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2022-11-18 19:44:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 599 transitions. [2022-11-18 19:44:37,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-18 19:44:37,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:37,480 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:37,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 19:44:37,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 19:44:37,689 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:44:37,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:37,690 INFO L85 PathProgramCache]: Analyzing trace with hash -415458067, now seen corresponding path program 2 times [2022-11-18 19:44:37,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:37,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541062055] [2022-11-18 19:44:37,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:37,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:39,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:44:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:39,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:44:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:39,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:44:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:39,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:44:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:39,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:44:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:39,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:44:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:39,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:44:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:39,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 19:44:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:39,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 19:44:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:39,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-18 19:44:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:39,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-18 19:44:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:39,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-18 19:44:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-18 19:44:39,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:39,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541062055] [2022-11-18 19:44:39,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541062055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:44:39,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990996835] [2022-11-18 19:44:39,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:44:39,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:39,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:44:39,771 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:44:39,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 19:44:40,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:44:40,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:44:40,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 2680 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 19:44:40,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:40,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 19:44:40,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-18 19:44:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:44:41,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:44:41,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990996835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:44:41,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:44:41,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 22 [2022-11-18 19:44:41,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315146876] [2022-11-18 19:44:41,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:44:41,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:44:41,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:41,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:44:41,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-11-18 19:44:41,117 INFO L87 Difference]: Start difference. First operand 430 states and 599 transitions. Second operand has 13 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-18 19:44:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:41,436 INFO L93 Difference]: Finished difference Result 703 states and 938 transitions. [2022-11-18 19:44:41,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:44:41,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 123 [2022-11-18 19:44:41,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:41,441 INFO L225 Difference]: With dead ends: 703 [2022-11-18 19:44:41,441 INFO L226 Difference]: Without dead ends: 503 [2022-11-18 19:44:41,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-11-18 19:44:41,444 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 44 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 2030 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:41,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 2030 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 162 Unchecked, 0.2s Time] [2022-11-18 19:44:41,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-11-18 19:44:41,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 466. [2022-11-18 19:44:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 334 states have (on average 1.1736526946107784) internal successors, (392), 342 states have internal predecessors, (392), 98 states have call successors, (98), 31 states have call predecessors, (98), 33 states have return successors, (151), 92 states have call predecessors, (151), 97 states have call successors, (151) [2022-11-18 19:44:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 641 transitions. [2022-11-18 19:44:41,491 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 641 transitions. Word has length 123 [2022-11-18 19:44:41,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:41,492 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 641 transitions. [2022-11-18 19:44:41,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-18 19:44:41,492 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 641 transitions. [2022-11-18 19:44:41,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-18 19:44:41,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:41,496 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:41,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 19:44:41,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 19:44:41,705 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:44:41,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:41,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1861255905, now seen corresponding path program 3 times [2022-11-18 19:44:41,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:41,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074738468] [2022-11-18 19:44:41,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:41,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:42,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:44:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:42,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:44:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:42,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:44:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:42,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:44:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:42,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:44:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:42,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:44:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:42,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:44:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:42,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 19:44:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:42,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-18 19:44:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:42,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-18 19:44:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:42,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-18 19:44:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:42,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-18 19:44:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 19:44:42,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:42,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074738468] [2022-11-18 19:44:42,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074738468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:44:42,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884757141] [2022-11-18 19:44:42,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:44:42,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:42,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:44:42,727 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:44:42,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 19:44:43,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 19:44:43,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:44:43,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 2393 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-18 19:44:43,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 89 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 19:44:45,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:45,852 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 19:44:45,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-18 19:44:45,863 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-18 19:44:45,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-11-18 19:44:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 48 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-18 19:44:45,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884757141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:45,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:44:45,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 26 [2022-11-18 19:44:45,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256899195] [2022-11-18 19:44:45,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:45,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 19:44:45,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:45,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 19:44:45,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-11-18 19:44:45,910 INFO L87 Difference]: Start difference. First operand 466 states and 641 transitions. Second operand has 26 states, 25 states have (on average 4.32) internal successors, (108), 24 states have internal predecessors, (108), 4 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-18 19:44:48,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:48,121 INFO L93 Difference]: Finished difference Result 810 states and 1111 transitions. [2022-11-18 19:44:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 19:44:48,122 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.32) internal successors, (108), 24 states have internal predecessors, (108), 4 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2022-11-18 19:44:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:48,127 INFO L225 Difference]: With dead ends: 810 [2022-11-18 19:44:48,127 INFO L226 Difference]: Without dead ends: 461 [2022-11-18 19:44:48,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 253 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=330, Invalid=2322, Unknown=0, NotChecked=0, Total=2652 [2022-11-18 19:44:48,134 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 159 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:48,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 846 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1533 Invalid, 0 Unknown, 398 Unchecked, 1.3s Time] [2022-11-18 19:44:48,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-11-18 19:44:48,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 432. [2022-11-18 19:44:48,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 307 states have (on average 1.1661237785016287) internal successors, (358), 312 states have internal predecessors, (358), 92 states have call successors, (92), 31 states have call predecessors, (92), 32 states have return successors, (135), 88 states have call predecessors, (135), 91 states have call successors, (135) [2022-11-18 19:44:48,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 585 transitions. [2022-11-18 19:44:48,182 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 585 transitions. Word has length 123 [2022-11-18 19:44:48,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:48,182 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 585 transitions. [2022-11-18 19:44:48,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.32) internal successors, (108), 24 states have internal predecessors, (108), 4 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-18 19:44:48,183 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 585 transitions. [2022-11-18 19:44:48,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-18 19:44:48,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:48,186 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:48,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 19:44:48,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 19:44:48,397 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:44:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:48,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1461024751, now seen corresponding path program 1 times [2022-11-18 19:44:48,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:48,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372540476] [2022-11-18 19:44:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:48,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:50,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:44:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:50,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:44:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:50,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:44:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:50,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:44:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:50,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:44:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:50,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:44:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:50,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:44:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:50,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 19:44:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:50,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 19:44:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:50,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-18 19:44:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:50,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-18 19:44:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:50,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-18 19:44:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-18 19:44:50,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:50,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372540476] [2022-11-18 19:44:50,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372540476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:44:50,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284322430] [2022-11-18 19:44:50,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:50,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:50,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:44:50,657 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:44:50,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 19:44:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:51,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 19:44:51,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-18 19:44:51,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:44:51,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284322430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:44:51,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:44:51,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 20 [2022-11-18 19:44:51,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629993661] [2022-11-18 19:44:51,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:44:51,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 19:44:51,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:51,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 19:44:51,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-11-18 19:44:51,554 INFO L87 Difference]: Start difference. First operand 432 states and 585 transitions. Second operand has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-18 19:44:51,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:51,794 INFO L93 Difference]: Finished difference Result 658 states and 880 transitions. [2022-11-18 19:44:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:44:51,795 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 123 [2022-11-18 19:44:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:51,798 INFO L225 Difference]: With dead ends: 658 [2022-11-18 19:44:51,799 INFO L226 Difference]: Without dead ends: 371 [2022-11-18 19:44:51,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2022-11-18 19:44:51,803 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 13 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:51,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1208 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:44:51,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-18 19:44:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 293. [2022-11-18 19:44:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 218 states have (on average 1.1376146788990826) internal successors, (248), 222 states have internal predecessors, (248), 49 states have call successors, (49), 23 states have call predecessors, (49), 25 states have return successors, (61), 47 states have call predecessors, (61), 48 states have call successors, (61) [2022-11-18 19:44:51,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 358 transitions. [2022-11-18 19:44:51,834 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 358 transitions. Word has length 123 [2022-11-18 19:44:51,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:51,835 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 358 transitions. [2022-11-18 19:44:51,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-18 19:44:51,835 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 358 transitions. [2022-11-18 19:44:51,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-18 19:44:51,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:51,838 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:51,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 19:44:52,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:52,048 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:44:52,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:52,049 INFO L85 PathProgramCache]: Analyzing trace with hash -458458694, now seen corresponding path program 1 times [2022-11-18 19:44:52,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:52,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520275888] [2022-11-18 19:44:52,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:52,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:44:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:44:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:44:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:44:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:44:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:44:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:44:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 19:44:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 19:44:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:44:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 19:44:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 19:44:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:44:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 19:44:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-18 19:44:52,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:52,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520275888] [2022-11-18 19:44:52,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520275888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:44:52,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:44:52,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 19:44:52,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692528637] [2022-11-18 19:44:52,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:44:52,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:44:52,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:52,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:44:52,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:44:52,684 INFO L87 Difference]: Start difference. First operand 293 states and 358 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-18 19:44:53,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:53,553 INFO L93 Difference]: Finished difference Result 370 states and 456 transitions. [2022-11-18 19:44:53,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:44:53,554 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 126 [2022-11-18 19:44:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:53,559 INFO L225 Difference]: With dead ends: 370 [2022-11-18 19:44:53,560 INFO L226 Difference]: Without dead ends: 321 [2022-11-18 19:44:53,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:44:53,561 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 142 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:53,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 319 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 19:44:53,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-11-18 19:44:53,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 298. [2022-11-18 19:44:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 222 states have (on average 1.135135135135135) internal successors, (252), 226 states have internal predecessors, (252), 49 states have call successors, (49), 23 states have call predecessors, (49), 26 states have return successors, (63), 48 states have call predecessors, (63), 48 states have call successors, (63) [2022-11-18 19:44:53,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 364 transitions. [2022-11-18 19:44:53,602 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 364 transitions. Word has length 126 [2022-11-18 19:44:53,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:53,605 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 364 transitions. [2022-11-18 19:44:53,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-18 19:44:53,606 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 364 transitions. [2022-11-18 19:44:53,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-18 19:44:53,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:53,609 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:53,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 19:44:53,610 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:44:53,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:53,610 INFO L85 PathProgramCache]: Analyzing trace with hash 750836692, now seen corresponding path program 1 times [2022-11-18 19:44:53,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:53,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847592305] [2022-11-18 19:44:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:53,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:54,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:44:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:54,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:44:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:54,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:44:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:55,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:44:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:55,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:44:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:55,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:44:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:55,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:44:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:55,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 19:44:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:55,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 19:44:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:55,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 19:44:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:55,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-18 19:44:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:55,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 19:44:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 19:44:55,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:55,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847592305] [2022-11-18 19:44:55,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847592305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:44:55,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524760737] [2022-11-18 19:44:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:55,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:55,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:44:55,346 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:44:55,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 19:44:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:56,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 2690 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-18 19:44:56,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:56,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:44:56,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 19:44:57,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 19:44:57,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-18 19:44:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-18 19:44:57,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:44:57,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524760737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:44:57,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:44:57,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [10] total 23 [2022-11-18 19:44:57,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126580166] [2022-11-18 19:44:57,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:44:57,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 19:44:57,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:57,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 19:44:57,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-11-18 19:44:57,231 INFO L87 Difference]: Start difference. First operand 298 states and 364 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 11 states have internal predecessors, (70), 6 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-18 19:44:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:58,124 INFO L93 Difference]: Finished difference Result 561 states and 708 transitions. [2022-11-18 19:44:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 19:44:58,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 11 states have internal predecessors, (70), 6 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 125 [2022-11-18 19:44:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:58,127 INFO L225 Difference]: With dead ends: 561 [2022-11-18 19:44:58,127 INFO L226 Difference]: Without dead ends: 343 [2022-11-18 19:44:58,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-11-18 19:44:58,129 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 248 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:58,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 835 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 518 Invalid, 0 Unknown, 295 Unchecked, 0.7s Time] [2022-11-18 19:44:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-18 19:44:58,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 302. [2022-11-18 19:44:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 225 states have (on average 1.1288888888888888) internal successors, (254), 229 states have internal predecessors, (254), 49 states have call successors, (49), 24 states have call predecessors, (49), 27 states have return successors, (63), 48 states have call predecessors, (63), 48 states have call successors, (63) [2022-11-18 19:44:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 366 transitions. [2022-11-18 19:44:58,170 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 366 transitions. Word has length 125 [2022-11-18 19:44:58,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:58,170 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 366 transitions. [2022-11-18 19:44:58,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 11 states have internal predecessors, (70), 6 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-18 19:44:58,171 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 366 transitions. [2022-11-18 19:44:58,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-18 19:44:58,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:58,174 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:58,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-18 19:44:58,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 19:44:58,385 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:44:58,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:58,385 INFO L85 PathProgramCache]: Analyzing trace with hash -135533325, now seen corresponding path program 1 times [2022-11-18 19:44:58,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:58,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948831339] [2022-11-18 19:44:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:58,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:59,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:44:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:59,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:44:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:59,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:44:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:59,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:44:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:59,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:45:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:00,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:45:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:00,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:45:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:00,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-18 19:45:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:00,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-18 19:45:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:00,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-18 19:45:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:00,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 19:45:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:00,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-18 19:45:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:00,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 19:45:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-18 19:45:00,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:45:00,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948831339] [2022-11-18 19:45:00,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948831339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:45:00,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079733214] [2022-11-18 19:45:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:00,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:45:00,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:45:00,289 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:45:00,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 19:45:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:00,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 2730 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 19:45:00,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:01,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-18 19:45:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-18 19:45:01,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:45:01,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079733214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:45:01,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:45:01,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 12 [2022-11-18 19:45:01,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242878379] [2022-11-18 19:45:01,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:45:01,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 19:45:01,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:45:01,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 19:45:01,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:45:01,188 INFO L87 Difference]: Start difference. First operand 302 states and 366 transitions. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 8 states have internal predecessors, (72), 4 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-18 19:45:01,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:01,686 INFO L93 Difference]: Finished difference Result 565 states and 709 transitions. [2022-11-18 19:45:01,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 19:45:01,687 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 8 states have internal predecessors, (72), 4 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 132 [2022-11-18 19:45:01,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:01,689 INFO L225 Difference]: With dead ends: 565 [2022-11-18 19:45:01,689 INFO L226 Difference]: Without dead ends: 344 [2022-11-18 19:45:01,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:45:01,690 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 79 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:01,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 1020 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 228 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-11-18 19:45:01,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-18 19:45:01,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 308. [2022-11-18 19:45:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 230 states have (on average 1.1217391304347826) internal successors, (258), 235 states have internal predecessors, (258), 49 states have call successors, (49), 24 states have call predecessors, (49), 28 states have return successors, (68), 48 states have call predecessors, (68), 48 states have call successors, (68) [2022-11-18 19:45:01,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 375 transitions. [2022-11-18 19:45:01,723 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 375 transitions. Word has length 132 [2022-11-18 19:45:01,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:01,724 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 375 transitions. [2022-11-18 19:45:01,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 8 states have internal predecessors, (72), 4 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-18 19:45:01,724 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 375 transitions. [2022-11-18 19:45:01,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-18 19:45:01,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:01,727 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:01,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 19:45:01,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:45:01,937 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:45:01,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:01,937 INFO L85 PathProgramCache]: Analyzing trace with hash -932861763, now seen corresponding path program 1 times [2022-11-18 19:45:01,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:45:01,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992092451] [2022-11-18 19:45:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:01,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:45:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:03,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:45:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:03,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:45:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:03,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:45:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:03,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:45:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:03,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:45:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:03,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:45:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:03,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:45:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:03,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 19:45:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:03,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 19:45:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:03,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-18 19:45:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:03,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-18 19:45:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:03,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-18 19:45:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 32 proven. 14 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-18 19:45:03,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:45:03,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992092451] [2022-11-18 19:45:03,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992092451] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:45:03,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008811804] [2022-11-18 19:45:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:03,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:45:03,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:45:03,651 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:45:03,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 19:45:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:04,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 2697 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-18 19:45:04,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:04,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:45:04,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:45:04,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 19:45:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 64 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-18 19:45:06,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:45:08,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008811804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:45:08,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:45:08,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 23 [2022-11-18 19:45:08,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656202653] [2022-11-18 19:45:08,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:45:08,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 19:45:08,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:45:08,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 19:45:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=782, Unknown=1, NotChecked=0, Total=870 [2022-11-18 19:45:08,867 INFO L87 Difference]: Start difference. First operand 308 states and 375 transitions. Second operand has 23 states, 22 states have (on average 5.863636363636363) internal successors, (129), 20 states have internal predecessors, (129), 9 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-18 19:45:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:13,087 INFO L93 Difference]: Finished difference Result 648 states and 835 transitions. [2022-11-18 19:45:13,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 19:45:13,091 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.863636363636363) internal successors, (129), 20 states have internal predecessors, (129), 9 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) Word has length 131 [2022-11-18 19:45:13,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:13,094 INFO L225 Difference]: With dead ends: 648 [2022-11-18 19:45:13,094 INFO L226 Difference]: Without dead ends: 479 [2022-11-18 19:45:13,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 212 SyntacticMatches, 16 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=432, Invalid=3227, Unknown=1, NotChecked=0, Total=3660 [2022-11-18 19:45:13,097 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 236 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 2929 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 4143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1090 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:13,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1169 Invalid, 4143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2929 Invalid, 0 Unknown, 1090 Unchecked, 2.5s Time] [2022-11-18 19:45:13,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-18 19:45:13,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 429. [2022-11-18 19:45:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 322 states have (on average 1.139751552795031) internal successors, (367), 328 states have internal predecessors, (367), 69 states have call successors, (69), 30 states have call predecessors, (69), 37 states have return successors, (103), 70 states have call predecessors, (103), 68 states have call successors, (103) [2022-11-18 19:45:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 539 transitions. [2022-11-18 19:45:13,145 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 539 transitions. Word has length 131 [2022-11-18 19:45:13,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:13,145 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 539 transitions. [2022-11-18 19:45:13,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.863636363636363) internal successors, (129), 20 states have internal predecessors, (129), 9 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-18 19:45:13,146 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 539 transitions. [2022-11-18 19:45:13,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-18 19:45:13,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:13,148 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:13,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 19:45:13,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:45:13,362 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:45:13,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:13,363 INFO L85 PathProgramCache]: Analyzing trace with hash 659375237, now seen corresponding path program 1 times [2022-11-18 19:45:13,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:45:13,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303966571] [2022-11-18 19:45:13,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:13,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:45:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:14,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:45:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:14,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:45:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:14,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:45:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:14,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:45:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:14,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:45:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:14,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:45:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:14,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:45:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:14,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 19:45:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:15,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 19:45:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:15,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-18 19:45:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:15,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-18 19:45:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:15,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-18 19:45:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 32 proven. 35 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-18 19:45:15,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:45:15,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303966571] [2022-11-18 19:45:15,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303966571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:45:15,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184289372] [2022-11-18 19:45:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:15,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:45:15,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:45:15,301 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:45:15,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 19:45:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:15,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-18 19:45:15,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:15,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:45:16,219 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 19:45:16,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-11-18 19:45:16,938 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-18 19:45:16,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2022-11-18 19:45:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 115 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-18 19:45:16,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:45:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-18 19:45:17,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184289372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:45:17,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:45:17,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 11] total 26 [2022-11-18 19:45:17,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738662832] [2022-11-18 19:45:17,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:45:17,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 19:45:17,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:45:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 19:45:17,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-11-18 19:45:17,523 INFO L87 Difference]: Start difference. First operand 429 states and 539 transitions. Second operand has 26 states, 23 states have (on average 6.086956521739131) internal successors, (140), 23 states have internal predecessors, (140), 10 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) [2022-11-18 19:45:20,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:20,879 INFO L93 Difference]: Finished difference Result 760 states and 992 transitions. [2022-11-18 19:45:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 19:45:20,880 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 6.086956521739131) internal successors, (140), 23 states have internal predecessors, (140), 10 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) Word has length 131 [2022-11-18 19:45:20,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:20,883 INFO L225 Difference]: With dead ends: 760 [2022-11-18 19:45:20,884 INFO L226 Difference]: Without dead ends: 561 [2022-11-18 19:45:20,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 268 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 19:45:20,886 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 260 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 2548 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 3113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:20,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 794 Invalid, 3113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2548 Invalid, 0 Unknown, 446 Unchecked, 2.6s Time] [2022-11-18 19:45:20,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-11-18 19:45:20,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 471. [2022-11-18 19:45:20,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 348 states have (on average 1.1408045977011494) internal successors, (397), 352 states have internal predecessors, (397), 83 states have call successors, (83), 35 states have call predecessors, (83), 39 states have return successors, (121), 83 states have call predecessors, (121), 82 states have call successors, (121) [2022-11-18 19:45:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 601 transitions. [2022-11-18 19:45:20,969 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 601 transitions. Word has length 131 [2022-11-18 19:45:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:20,970 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 601 transitions. [2022-11-18 19:45:20,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 6.086956521739131) internal successors, (140), 23 states have internal predecessors, (140), 10 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) [2022-11-18 19:45:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 601 transitions. [2022-11-18 19:45:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-18 19:45:20,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:20,975 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:20,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 19:45:21,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-18 19:45:21,195 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:45:21,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:21,195 INFO L85 PathProgramCache]: Analyzing trace with hash -556778489, now seen corresponding path program 2 times [2022-11-18 19:45:21,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:45:21,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959032310] [2022-11-18 19:45:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:21,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:45:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:24,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:45:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:24,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:45:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:24,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:45:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:24,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:45:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:24,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:45:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:24,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:45:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:24,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:45:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:24,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 19:45:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:24,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 19:45:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:25,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-18 19:45:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:25,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-18 19:45:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:25,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-18 19:45:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-18 19:45:25,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:45:25,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959032310] [2022-11-18 19:45:25,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959032310] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:45:25,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913035023] [2022-11-18 19:45:25,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:45:25,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:45:25,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:45:25,263 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:45:25,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 19:45:26,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:45:26,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:45:26,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-18 19:45:26,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:26,861 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 19:45:26,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-11-18 19:45:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 67 proven. 64 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 19:45:39,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:45:40,945 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-18 19:45:40,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913035023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:45:40,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:45:40,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 14] total 46 [2022-11-18 19:45:40,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878203092] [2022-11-18 19:45:40,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:45:40,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-18 19:45:40,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:45:40,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-18 19:45:40,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1904, Unknown=1, NotChecked=0, Total=2070 [2022-11-18 19:45:40,949 INFO L87 Difference]: Start difference. First operand 471 states and 601 transitions. Second operand has 46 states, 44 states have (on average 4.113636363636363) internal successors, (181), 42 states have internal predecessors, (181), 15 states have call successors, (39), 8 states have call predecessors, (39), 10 states have return successors, (35), 13 states have call predecessors, (35), 15 states have call successors, (35) [2022-11-18 19:45:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:51,834 INFO L93 Difference]: Finished difference Result 832 states and 1065 transitions. [2022-11-18 19:45:51,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-18 19:45:51,837 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 4.113636363636363) internal successors, (181), 42 states have internal predecessors, (181), 15 states have call successors, (39), 8 states have call predecessors, (39), 10 states have return successors, (35), 13 states have call predecessors, (35), 15 states have call successors, (35) Word has length 131 [2022-11-18 19:45:51,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:51,842 INFO L225 Difference]: With dead ends: 832 [2022-11-18 19:45:51,842 INFO L226 Difference]: Without dead ends: 635 [2022-11-18 19:45:51,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 260 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=692, Invalid=6617, Unknown=1, NotChecked=0, Total=7310 [2022-11-18 19:45:51,846 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 373 mSDsluCounter, 2062 mSDsCounter, 0 mSdLazyCounter, 6615 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 2184 SdHoareTripleChecker+Invalid, 7818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 6615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1014 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:51,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 2184 Invalid, 7818 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [189 Valid, 6615 Invalid, 0 Unknown, 1014 Unchecked, 8.3s Time] [2022-11-18 19:45:51,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-11-18 19:45:51,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 516. [2022-11-18 19:45:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 393 states have (on average 1.1119592875318065) internal successors, (437), 401 states have internal predecessors, (437), 78 states have call successors, (78), 35 states have call predecessors, (78), 44 states have return successors, (110), 79 states have call predecessors, (110), 77 states have call successors, (110) [2022-11-18 19:45:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 625 transitions. [2022-11-18 19:45:51,916 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 625 transitions. Word has length 131 [2022-11-18 19:45:51,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:51,916 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 625 transitions. [2022-11-18 19:45:51,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 4.113636363636363) internal successors, (181), 42 states have internal predecessors, (181), 15 states have call successors, (39), 8 states have call predecessors, (39), 10 states have return successors, (35), 13 states have call predecessors, (35), 15 states have call successors, (35) [2022-11-18 19:45:51,917 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 625 transitions. [2022-11-18 19:45:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-18 19:45:51,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:51,919 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:51,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 19:45:52,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 19:45:52,126 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:45:52,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:52,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1277488083, now seen corresponding path program 1 times [2022-11-18 19:45:52,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:45:52,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783038396] [2022-11-18 19:45:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:52,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:45:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:52,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:45:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:52,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:45:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:52,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:45:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:52,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:45:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:52,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:45:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:52,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:45:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:52,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:45:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:52,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-18 19:45:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:52,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-18 19:45:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:52,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-18 19:45:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:52,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 19:45:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:52,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-18 19:45:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:52,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 19:45:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-18 19:45:52,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:45:52,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783038396] [2022-11-18 19:45:52,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783038396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:45:52,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:45:52,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:45:52,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232368830] [2022-11-18 19:45:52,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:45:52,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:45:52,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:45:52,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:45:52,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:45:52,922 INFO L87 Difference]: Start difference. First operand 516 states and 625 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-18 19:45:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:53,556 INFO L93 Difference]: Finished difference Result 635 states and 774 transitions. [2022-11-18 19:45:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:45:53,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 132 [2022-11-18 19:45:53,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:53,559 INFO L225 Difference]: With dead ends: 635 [2022-11-18 19:45:53,559 INFO L226 Difference]: Without dead ends: 507 [2022-11-18 19:45:53,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:45:53,560 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 111 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:53,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 211 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 19:45:53,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-11-18 19:45:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 497. [2022-11-18 19:45:53,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 376 states have (on average 1.101063829787234) internal successors, (414), 382 states have internal predecessors, (414), 78 states have call successors, (78), 35 states have call predecessors, (78), 42 states have return successors, (108), 79 states have call predecessors, (108), 77 states have call successors, (108) [2022-11-18 19:45:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 600 transitions. [2022-11-18 19:45:53,616 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 600 transitions. Word has length 132 [2022-11-18 19:45:53,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:53,617 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 600 transitions. [2022-11-18 19:45:53,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-18 19:45:53,617 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 600 transitions. [2022-11-18 19:45:53,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-18 19:45:53,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:53,620 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:53,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-18 19:45:53,620 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:45:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:53,620 INFO L85 PathProgramCache]: Analyzing trace with hash 665294586, now seen corresponding path program 1 times [2022-11-18 19:45:53,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:45:53,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199822645] [2022-11-18 19:45:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:53,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:45:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:45:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:45:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:45:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:45:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:45:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:45:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:45:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-18 19:45:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-18 19:45:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:45:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:45:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 19:45:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 19:45:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:45:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 19:45:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-11-18 19:45:54,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:45:54,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199822645] [2022-11-18 19:45:54,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199822645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:45:54,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:45:54,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 19:45:54,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539806790] [2022-11-18 19:45:54,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:45:54,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 19:45:54,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:45:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 19:45:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:45:54,460 INFO L87 Difference]: Start difference. First operand 497 states and 600 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-18 19:45:55,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:55,351 INFO L93 Difference]: Finished difference Result 514 states and 622 transitions. [2022-11-18 19:45:55,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 19:45:55,352 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 134 [2022-11-18 19:45:55,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:55,354 INFO L225 Difference]: With dead ends: 514 [2022-11-18 19:45:55,354 INFO L226 Difference]: Without dead ends: 512 [2022-11-18 19:45:55,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:45:55,355 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 186 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:55,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 216 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 19:45:55,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-18 19:45:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 501. [2022-11-18 19:45:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 379 states have (on average 1.1002638522427441) internal successors, (417), 385 states have internal predecessors, (417), 78 states have call successors, (78), 36 states have call predecessors, (78), 43 states have return successors, (108), 79 states have call predecessors, (108), 77 states have call successors, (108) [2022-11-18 19:45:55,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 603 transitions. [2022-11-18 19:45:55,427 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 603 transitions. Word has length 134 [2022-11-18 19:45:55,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:55,428 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 603 transitions. [2022-11-18 19:45:55,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-18 19:45:55,428 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 603 transitions. [2022-11-18 19:45:55,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-18 19:45:55,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:55,431 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:55,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-18 19:45:55,431 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:45:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:55,432 INFO L85 PathProgramCache]: Analyzing trace with hash 170421652, now seen corresponding path program 1 times [2022-11-18 19:45:55,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:45:55,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681731398] [2022-11-18 19:45:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:55,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:45:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:56,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:45:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:56,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:45:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:56,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:45:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:56,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:45:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:56,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:45:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:56,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:45:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:56,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:45:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:56,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-18 19:45:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:56,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-18 19:45:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:56,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-18 19:45:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:56,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 19:45:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:56,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-18 19:45:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:56,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 19:45:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-18 19:45:56,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:45:56,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681731398] [2022-11-18 19:45:56,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681731398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:45:56,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:45:56,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 19:45:56,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634286813] [2022-11-18 19:45:56,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:45:56,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:45:56,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:45:56,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:45:56,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:45:56,353 INFO L87 Difference]: Start difference. First operand 501 states and 603 transitions. Second operand has 11 states, 10 states have (on average 5.6) internal successors, (56), 8 states have internal predecessors, (56), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-18 19:45:57,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:57,335 INFO L93 Difference]: Finished difference Result 513 states and 617 transitions. [2022-11-18 19:45:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:45:57,336 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.6) internal successors, (56), 8 states have internal predecessors, (56), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 134 [2022-11-18 19:45:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:57,339 INFO L225 Difference]: With dead ends: 513 [2022-11-18 19:45:57,339 INFO L226 Difference]: Without dead ends: 511 [2022-11-18 19:45:57,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-11-18 19:45:57,340 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 116 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:57,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 563 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 19:45:57,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-11-18 19:45:57,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 501. [2022-11-18 19:45:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 379 states have (on average 1.1002638522427441) internal successors, (417), 385 states have internal predecessors, (417), 78 states have call successors, (78), 36 states have call predecessors, (78), 43 states have return successors, (108), 79 states have call predecessors, (108), 77 states have call successors, (108) [2022-11-18 19:45:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 603 transitions. [2022-11-18 19:45:57,413 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 603 transitions. Word has length 134 [2022-11-18 19:45:57,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:57,414 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 603 transitions. [2022-11-18 19:45:57,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.6) internal successors, (56), 8 states have internal predecessors, (56), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-18 19:45:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 603 transitions. [2022-11-18 19:45:57,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-18 19:45:57,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:57,418 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:57,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-18 19:45:57,418 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:45:57,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:57,419 INFO L85 PathProgramCache]: Analyzing trace with hash 108106458, now seen corresponding path program 1 times [2022-11-18 19:45:57,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:45:57,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988958532] [2022-11-18 19:45:57,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:57,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:45:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:58,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:45:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:58,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:45:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:58,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:45:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:58,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:45:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:58,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:45:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:58,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:45:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:58,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:45:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:58,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-18 19:45:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:58,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-18 19:45:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:58,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-18 19:45:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:59,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 19:45:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:59,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-18 19:45:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:59,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 19:45:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-18 19:45:59,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:45:59,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988958532] [2022-11-18 19:45:59,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988958532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:45:59,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895995817] [2022-11-18 19:45:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:59,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:45:59,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:45:59,127 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:45:59,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 19:45:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:59,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 138 conjunts are in the unsatisfiable core [2022-11-18 19:45:59,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:59,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 19:46:00,346 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:46:00,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-18 19:46:00,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-18 19:46:00,430 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:46:00,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2022-11-18 19:46:00,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 19:46:00,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:46:00,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:46:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 68 proven. 84 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 19:46:06,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:46:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 67 proven. 19 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-18 19:46:10,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895995817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:46:10,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:46:10,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 41, 23] total 71 [2022-11-18 19:46:10,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419564308] [2022-11-18 19:46:10,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:46:10,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-18 19:46:10,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:46:10,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-18 19:46:10,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=4689, Unknown=0, NotChecked=0, Total=4970 [2022-11-18 19:46:10,176 INFO L87 Difference]: Start difference. First operand 501 states and 603 transitions. Second operand has 71 states, 64 states have (on average 3.171875) internal successors, (203), 61 states have internal predecessors, (203), 17 states have call successors, (36), 9 states have call predecessors, (36), 13 states have return successors, (31), 15 states have call predecessors, (31), 15 states have call successors, (31) [2022-11-18 19:46:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:46:23,162 INFO L93 Difference]: Finished difference Result 752 states and 913 transitions. [2022-11-18 19:46:23,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-18 19:46:23,163 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 64 states have (on average 3.171875) internal successors, (203), 61 states have internal predecessors, (203), 17 states have call successors, (36), 9 states have call predecessors, (36), 13 states have return successors, (31), 15 states have call predecessors, (31), 15 states have call successors, (31) Word has length 134 [2022-11-18 19:46:23,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:46:23,167 INFO L225 Difference]: With dead ends: 752 [2022-11-18 19:46:23,167 INFO L226 Difference]: Without dead ends: 585 [2022-11-18 19:46:23,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 241 SyntacticMatches, 8 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5764 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=1204, Invalid=17978, Unknown=0, NotChecked=0, Total=19182 [2022-11-18 19:46:23,174 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 304 mSDsluCounter, 2618 mSDsCounter, 0 mSdLazyCounter, 5025 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 2711 SdHoareTripleChecker+Invalid, 7549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 5025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2382 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:46:23,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 2711 Invalid, 7549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 5025 Invalid, 0 Unknown, 2382 Unchecked, 4.9s Time] [2022-11-18 19:46:23,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-11-18 19:46:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 479. [2022-11-18 19:46:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 358 states have (on average 1.094972067039106) internal successors, (392), 363 states have internal predecessors, (392), 77 states have call successors, (77), 37 states have call predecessors, (77), 43 states have return successors, (104), 78 states have call predecessors, (104), 76 states have call successors, (104) [2022-11-18 19:46:23,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 573 transitions. [2022-11-18 19:46:23,260 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 573 transitions. Word has length 134 [2022-11-18 19:46:23,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:46:23,261 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 573 transitions. [2022-11-18 19:46:23,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 64 states have (on average 3.171875) internal successors, (203), 61 states have internal predecessors, (203), 17 states have call successors, (36), 9 states have call predecessors, (36), 13 states have return successors, (31), 15 states have call predecessors, (31), 15 states have call successors, (31) [2022-11-18 19:46:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 573 transitions. [2022-11-18 19:46:23,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-18 19:46:23,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:46:23,264 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:46:23,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 19:46:23,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 19:46:23,487 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:46:23,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:46:23,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1511185504, now seen corresponding path program 1 times [2022-11-18 19:46:23,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:46:23,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698477935] [2022-11-18 19:46:23,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:46:23,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:46:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:24,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:46:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:24,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:46:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:24,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:46:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:24,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:46:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:24,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:46:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:24,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:46:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:24,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:46:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:24,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-18 19:46:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:24,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-18 19:46:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:24,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:46:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:25,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:46:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:25,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 19:46:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:25,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 19:46:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:25,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:46:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:25,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 19:46:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:25,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-18 19:46:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-18 19:46:25,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:46:25,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698477935] [2022-11-18 19:46:25,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698477935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:46:25,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232767879] [2022-11-18 19:46:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:46:25,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:46:25,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:46:25,386 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:46:25,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 19:46:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:26,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 2783 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-18 19:46:26,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:46:26,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 19:46:26,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 19:46:27,000 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:46:27,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 19:46:27,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:46:27,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 19:46:27,109 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:46:27,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-18 19:46:27,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-18 19:46:27,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:46:27,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 19:46:27,532 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:46:27,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2022-11-18 19:46:27,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:46:27,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2022-11-18 19:46:27,697 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:46:27,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-18 19:46:27,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:46:27,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2022-11-18 19:46:29,828 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_31| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_31|) 8) 0))) (exists ((|v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_31| Int)) (not (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_31|) 16) 18446744073709551616) 0)))) is different from true [2022-11-18 19:46:39,826 WARN L233 SmtUtils]: Spent 5.55s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:46:49,599 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:46:49,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:46:49,649 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 19:46:49,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 34 [2022-11-18 19:46:49,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:46:49,660 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-18 19:46:49,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2022-11-18 19:46:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 108 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 1 not checked. [2022-11-18 19:46:49,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:46:56,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232767879] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:46:56,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:46:56,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 27] total 37 [2022-11-18 19:46:56,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331810526] [2022-11-18 19:46:56,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:46:56,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 19:46:56,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:46:56,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 19:46:56,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1802, Unknown=7, NotChecked=86, Total=2070 [2022-11-18 19:46:56,783 INFO L87 Difference]: Start difference. First operand 479 states and 573 transitions. Second operand has 37 states, 34 states have (on average 4.088235294117647) internal successors, (139), 31 states have internal predecessors, (139), 12 states have call successors, (32), 8 states have call predecessors, (32), 9 states have return successors, (31), 9 states have call predecessors, (31), 12 states have call successors, (31) [2022-11-18 19:47:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:47:04,290 INFO L93 Difference]: Finished difference Result 689 states and 850 transitions. [2022-11-18 19:47:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-18 19:47:04,295 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 4.088235294117647) internal successors, (139), 31 states have internal predecessors, (139), 12 states have call successors, (32), 8 states have call predecessors, (32), 9 states have return successors, (31), 9 states have call predecessors, (31), 12 states have call successors, (31) Word has length 140 [2022-11-18 19:47:04,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:47:04,298 INFO L225 Difference]: With dead ends: 689 [2022-11-18 19:47:04,299 INFO L226 Difference]: Without dead ends: 471 [2022-11-18 19:47:04,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=338, Invalid=3949, Unknown=7, NotChecked=128, Total=4422 [2022-11-18 19:47:04,301 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 226 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 2658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 803 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:47:04,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 801 Invalid, 2658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1658 Invalid, 0 Unknown, 803 Unchecked, 1.9s Time] [2022-11-18 19:47:04,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-11-18 19:47:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 407. [2022-11-18 19:47:04,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 303 states have (on average 1.0957095709570956) internal successors, (332), 307 states have internal predecessors, (332), 68 states have call successors, (68), 31 states have call predecessors, (68), 35 states have return successors, (89), 68 states have call predecessors, (89), 66 states have call successors, (89) [2022-11-18 19:47:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 489 transitions. [2022-11-18 19:47:04,355 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 489 transitions. Word has length 140 [2022-11-18 19:47:04,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:47:04,355 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 489 transitions. [2022-11-18 19:47:04,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 4.088235294117647) internal successors, (139), 31 states have internal predecessors, (139), 12 states have call successors, (32), 8 states have call predecessors, (32), 9 states have return successors, (31), 9 states have call predecessors, (31), 12 states have call successors, (31) [2022-11-18 19:47:04,356 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 489 transitions. [2022-11-18 19:47:04,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-18 19:47:04,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:04,358 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:47:04,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 19:47:04,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 19:47:04,570 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:04,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:04,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1117574554, now seen corresponding path program 1 times [2022-11-18 19:47:04,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:04,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387702168] [2022-11-18 19:47:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:04,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:07,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:47:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:07,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:47:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:07,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:47:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:07,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:47:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:07,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:47:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:07,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:47:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:07,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:47:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:07,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-18 19:47:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:07,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:47:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:07,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-18 19:47:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:07,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-18 19:47:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:07,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-18 19:47:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:07,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 19:47:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 32 proven. 14 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-18 19:47:07,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:47:07,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387702168] [2022-11-18 19:47:07,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387702168] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:47:07,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147810860] [2022-11-18 19:47:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:07,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:07,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:47:07,633 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:47:07,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 19:47:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:08,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 2752 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-18 19:47:08,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:47:08,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:47:10,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:10,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 19:47:12,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:12,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 19:47:12,900 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:47:12,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-18 19:47:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 60 proven. 58 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-18 19:47:24,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:47:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-18 19:47:24,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147810860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:47:24,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:47:24,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 11] total 40 [2022-11-18 19:47:24,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584320713] [2022-11-18 19:47:24,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:47:24,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 19:47:24,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:47:24,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 19:47:24,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1431, Unknown=1, NotChecked=0, Total=1560 [2022-11-18 19:47:24,943 INFO L87 Difference]: Start difference. First operand 407 states and 489 transitions. Second operand has 40 states, 38 states have (on average 4.631578947368421) internal successors, (176), 35 states have internal predecessors, (176), 17 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (38), 15 states have call predecessors, (38), 17 states have call successors, (38) [2022-11-18 19:47:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:47:29,927 INFO L93 Difference]: Finished difference Result 594 states and 718 transitions. [2022-11-18 19:47:29,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 19:47:29,928 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 4.631578947368421) internal successors, (176), 35 states have internal predecessors, (176), 17 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (38), 15 states have call predecessors, (38), 17 states have call successors, (38) Word has length 138 [2022-11-18 19:47:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:47:29,929 INFO L225 Difference]: With dead ends: 594 [2022-11-18 19:47:29,930 INFO L226 Difference]: Without dead ends: 357 [2022-11-18 19:47:29,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 280 SyntacticMatches, 13 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=536, Invalid=4575, Unknown=1, NotChecked=0, Total=5112 [2022-11-18 19:47:29,932 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 325 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 3191 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 3911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 3191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 565 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:47:29,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1387 Invalid, 3911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 3191 Invalid, 0 Unknown, 565 Unchecked, 3.1s Time] [2022-11-18 19:47:29,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-11-18 19:47:29,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 322. [2022-11-18 19:47:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 241 states have (on average 1.0788381742738589) internal successors, (260), 242 states have internal predecessors, (260), 51 states have call successors, (51), 27 states have call predecessors, (51), 29 states have return successors, (57), 52 states have call predecessors, (57), 49 states have call successors, (57) [2022-11-18 19:47:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 368 transitions. [2022-11-18 19:47:29,983 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 368 transitions. Word has length 138 [2022-11-18 19:47:29,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:47:29,983 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 368 transitions. [2022-11-18 19:47:29,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 4.631578947368421) internal successors, (176), 35 states have internal predecessors, (176), 17 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (38), 15 states have call predecessors, (38), 17 states have call successors, (38) [2022-11-18 19:47:29,984 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 368 transitions. [2022-11-18 19:47:29,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-18 19:47:29,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:29,985 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:47:29,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 19:47:30,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 19:47:30,196 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:30,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:30,196 INFO L85 PathProgramCache]: Analyzing trace with hash 714418453, now seen corresponding path program 1 times [2022-11-18 19:47:30,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:30,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797475141] [2022-11-18 19:47:30,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:30,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:47:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:47:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:47:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:47:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:47:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:47:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:47:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 19:47:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 19:47:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 19:47:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-18 19:47:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 19:47:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:47:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:47:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 19:47:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 19:47:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-18 19:47:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-11-18 19:47:30,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:47:30,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797475141] [2022-11-18 19:47:30,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797475141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:47:30,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:47:30,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:47:30,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464233513] [2022-11-18 19:47:30,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:47:30,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:47:30,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:47:30,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:47:30,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:47:30,419 INFO L87 Difference]: Start difference. First operand 322 states and 368 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-18 19:47:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:47:30,929 INFO L93 Difference]: Finished difference Result 430 states and 500 transitions. [2022-11-18 19:47:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:47:30,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 149 [2022-11-18 19:47:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:47:30,932 INFO L225 Difference]: With dead ends: 430 [2022-11-18 19:47:30,932 INFO L226 Difference]: Without dead ends: 327 [2022-11-18 19:47:30,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:47:30,933 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 131 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:47:30,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 175 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:47:30,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-18 19:47:30,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 305. [2022-11-18 19:47:30,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 231 states have (on average 1.0735930735930737) internal successors, (248), 231 states have internal predecessors, (248), 46 states have call successors, (46), 26 states have call predecessors, (46), 27 states have return successors, (51), 47 states have call predecessors, (51), 45 states have call successors, (51) [2022-11-18 19:47:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 345 transitions. [2022-11-18 19:47:30,980 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 345 transitions. Word has length 149 [2022-11-18 19:47:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:47:30,981 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 345 transitions. [2022-11-18 19:47:30,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-18 19:47:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 345 transitions. [2022-11-18 19:47:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-18 19:47:30,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:30,983 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:47:30,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-18 19:47:30,983 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:30,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:30,984 INFO L85 PathProgramCache]: Analyzing trace with hash 779865396, now seen corresponding path program 1 times [2022-11-18 19:47:30,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:30,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763645638] [2022-11-18 19:47:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:30,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:47:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:47:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:47:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:47:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:47:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:47:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:47:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-18 19:47:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:47:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-18 19:47:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 19:47:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-18 19:47:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 19:47:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:47:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:47:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 19:47:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 19:47:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-18 19:47:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-18 19:47:31,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:47:31,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763645638] [2022-11-18 19:47:31,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763645638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:47:31,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:47:31,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 19:47:31,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172776545] [2022-11-18 19:47:31,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:47:31,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:47:31,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:47:31,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:47:31,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:47:31,859 INFO L87 Difference]: Start difference. First operand 305 states and 345 transitions. Second operand has 10 states, 9 states have (on average 6.888888888888889) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-18 19:47:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:47:32,780 INFO L93 Difference]: Finished difference Result 332 states and 377 transitions. [2022-11-18 19:47:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 19:47:32,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.888888888888889) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 156 [2022-11-18 19:47:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:47:32,783 INFO L225 Difference]: With dead ends: 332 [2022-11-18 19:47:32,783 INFO L226 Difference]: Without dead ends: 330 [2022-11-18 19:47:32,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:47:32,784 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 159 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:47:32,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 437 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 19:47:32,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-18 19:47:32,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 315. [2022-11-18 19:47:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 237 states have (on average 1.0717299578059072) internal successors, (254), 238 states have internal predecessors, (254), 48 states have call successors, (48), 27 states have call predecessors, (48), 29 states have return successors, (56), 49 states have call predecessors, (56), 47 states have call successors, (56) [2022-11-18 19:47:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 358 transitions. [2022-11-18 19:47:32,827 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 358 transitions. Word has length 156 [2022-11-18 19:47:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:47:32,827 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 358 transitions. [2022-11-18 19:47:32,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.888888888888889) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-18 19:47:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 358 transitions. [2022-11-18 19:47:32,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-18 19:47:32,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:32,829 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:47:32,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-18 19:47:32,829 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:32,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:32,830 INFO L85 PathProgramCache]: Analyzing trace with hash -896614759, now seen corresponding path program 1 times [2022-11-18 19:47:32,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:32,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545086976] [2022-11-18 19:47:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:32,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:47:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:47:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:47:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:47:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:47:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:47:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:47:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 19:47:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 19:47:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 19:47:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-18 19:47:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 19:47:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:47:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:47:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 19:47:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 19:47:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-18 19:47:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-11-18 19:47:33,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:47:33,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545086976] [2022-11-18 19:47:33,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545086976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:47:33,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:47:33,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 19:47:33,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863854201] [2022-11-18 19:47:33,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:47:33,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:47:33,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:47:33,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:47:33,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:47:33,697 INFO L87 Difference]: Start difference. First operand 315 states and 358 transitions. Second operand has 11 states, 10 states have (on average 5.8) internal successors, (58), 8 states have internal predecessors, (58), 5 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-18 19:47:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:47:34,683 INFO L93 Difference]: Finished difference Result 417 states and 486 transitions. [2022-11-18 19:47:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 19:47:34,684 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.8) internal successors, (58), 8 states have internal predecessors, (58), 5 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 153 [2022-11-18 19:47:34,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:47:34,686 INFO L225 Difference]: With dead ends: 417 [2022-11-18 19:47:34,686 INFO L226 Difference]: Without dead ends: 317 [2022-11-18 19:47:34,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-11-18 19:47:34,687 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 163 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:47:34,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 442 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 19:47:34,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-11-18 19:47:34,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 316. [2022-11-18 19:47:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 238 states have (on average 1.0714285714285714) internal successors, (255), 239 states have internal predecessors, (255), 48 states have call successors, (48), 27 states have call predecessors, (48), 29 states have return successors, (56), 49 states have call predecessors, (56), 47 states have call successors, (56) [2022-11-18 19:47:34,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 359 transitions. [2022-11-18 19:47:34,736 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 359 transitions. Word has length 153 [2022-11-18 19:47:34,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:47:34,736 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 359 transitions. [2022-11-18 19:47:34,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.8) internal successors, (58), 8 states have internal predecessors, (58), 5 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-18 19:47:34,737 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 359 transitions. [2022-11-18 19:47:34,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-18 19:47:34,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:34,738 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:47:34,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-18 19:47:34,739 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:34,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:34,739 INFO L85 PathProgramCache]: Analyzing trace with hash -372278053, now seen corresponding path program 1 times [2022-11-18 19:47:34,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:34,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976175544] [2022-11-18 19:47:34,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:34,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:41,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:47:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:41,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:47:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:41,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:47:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:41,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:47:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:41,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:47:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:41,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:47:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:41,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:47:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:41,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 19:47:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:41,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 19:47:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:42,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 19:47:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:42,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-18 19:47:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:42,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 19:47:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:42,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:47:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:44,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:47:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:44,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 19:47:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:44,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 19:47:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:44,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-18 19:47:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 66 proven. 26 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-18 19:47:45,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:47:45,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976175544] [2022-11-18 19:47:45,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976175544] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:47:45,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358760702] [2022-11-18 19:47:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:45,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:45,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:47:45,100 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:47:45,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 19:47:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:45,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 2838 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 19:47:45,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:47:45,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 19:47:46,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-18 19:47:47,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:47:47,388 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-18 19:47:47,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 1 [2022-11-18 19:47:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-18 19:47:47,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:47:47,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358760702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:47:47,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:47:47,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [38] total 46 [2022-11-18 19:47:47,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732429248] [2022-11-18 19:47:47,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:47:47,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 19:47:47,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:47:47,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 19:47:47,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1908, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 19:47:47,394 INFO L87 Difference]: Start difference. First operand 316 states and 359 transitions. Second operand has 15 states, 14 states have (on average 6.071428571428571) internal successors, (85), 13 states have internal predecessors, (85), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-18 19:47:47,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:47:47,664 INFO L93 Difference]: Finished difference Result 438 states and 504 transitions. [2022-11-18 19:47:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 19:47:47,664 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.071428571428571) internal successors, (85), 13 states have internal predecessors, (85), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 155 [2022-11-18 19:47:47,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:47:47,666 INFO L225 Difference]: With dead ends: 438 [2022-11-18 19:47:47,666 INFO L226 Difference]: Without dead ends: 312 [2022-11-18 19:47:47,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=179, Invalid=2173, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 19:47:47,668 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 29 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:47:47,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1088 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 116 Unchecked, 0.1s Time] [2022-11-18 19:47:47,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-18 19:47:47,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-11-18 19:47:47,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 234 states have (on average 1.0683760683760684) internal successors, (250), 235 states have internal predecessors, (250), 48 states have call successors, (48), 27 states have call predecessors, (48), 29 states have return successors, (56), 49 states have call predecessors, (56), 47 states have call successors, (56) [2022-11-18 19:47:47,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 354 transitions. [2022-11-18 19:47:47,718 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 354 transitions. Word has length 155 [2022-11-18 19:47:47,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:47:47,718 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 354 transitions. [2022-11-18 19:47:47,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.071428571428571) internal successors, (85), 13 states have internal predecessors, (85), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-18 19:47:47,719 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 354 transitions. [2022-11-18 19:47:47,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-18 19:47:47,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:47,721 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:47:47,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 19:47:47,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:47,932 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:47,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:47,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1572610169, now seen corresponding path program 1 times [2022-11-18 19:47:47,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:47,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947911216] [2022-11-18 19:47:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:47,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:51,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:47:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:51,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:47:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:51,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:47:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:51,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:47:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:51,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:47:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:51,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:47:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:51,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:47:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:52,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-18 19:47:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:52,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:47:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:52,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 19:47:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:52,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:47:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:52,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 19:47:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:52,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-18 19:47:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:52,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 19:47:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:52,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 19:47:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:52,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-18 19:47:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-18 19:47:52,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:47:52,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947911216] [2022-11-18 19:47:52,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947911216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:47:52,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:47:52,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-11-18 19:47:52,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077433899] [2022-11-18 19:47:52,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:47:52,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 19:47:52,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:47:52,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 19:47:52,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-11-18 19:47:52,777 INFO L87 Difference]: Start difference. First operand 312 states and 354 transitions. Second operand has 22 states, 20 states have (on average 2.8) internal successors, (56), 17 states have internal predecessors, (56), 10 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-18 19:47:56,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:47:56,105 INFO L93 Difference]: Finished difference Result 341 states and 394 transitions. [2022-11-18 19:47:56,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 19:47:56,106 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.8) internal successors, (56), 17 states have internal predecessors, (56), 10 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) Word has length 158 [2022-11-18 19:47:56,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:47:56,107 INFO L225 Difference]: With dead ends: 341 [2022-11-18 19:47:56,107 INFO L226 Difference]: Without dead ends: 339 [2022-11-18 19:47:56,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 19:47:56,108 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 238 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 2713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:47:56,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 525 Invalid, 2713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2524 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-18 19:47:56,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-18 19:47:56,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2022-11-18 19:47:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 244 states have (on average 1.069672131147541) internal successors, (261), 246 states have internal predecessors, (261), 52 states have call successors, (52), 28 states have call predecessors, (52), 31 states have return successors, (61), 53 states have call predecessors, (61), 51 states have call successors, (61) [2022-11-18 19:47:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 374 transitions. [2022-11-18 19:47:56,154 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 374 transitions. Word has length 158 [2022-11-18 19:47:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:47:56,154 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 374 transitions. [2022-11-18 19:47:56,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.8) internal successors, (56), 17 states have internal predecessors, (56), 10 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-18 19:47:56,155 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 374 transitions. [2022-11-18 19:47:56,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-18 19:47:56,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:56,157 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:47:56,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-18 19:47:56,157 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:56,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:56,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1820756663, now seen corresponding path program 1 times [2022-11-18 19:47:56,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:56,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820717185] [2022-11-18 19:47:56,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:56,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:59,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:47:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:59,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:47:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:59,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:47:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:00,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:48:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:00,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:48:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:00,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:48:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:00,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:48:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:00,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-18 19:48:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:00,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:48:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:00,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 19:48:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:00,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:48:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:00,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 19:48:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:00,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-18 19:48:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:00,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 19:48:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:00,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 19:48:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:00,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-18 19:48:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-18 19:48:00,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:48:00,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820717185] [2022-11-18 19:48:00,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820717185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:48:00,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:48:00,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-11-18 19:48:00,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374631466] [2022-11-18 19:48:00,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:48:00,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 19:48:00,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:48:00,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 19:48:00,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-11-18 19:48:00,456 INFO L87 Difference]: Start difference. First operand 328 states and 374 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 16 states have internal predecessors, (56), 9 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-18 19:48:02,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:48:02,919 INFO L93 Difference]: Finished difference Result 349 states and 404 transitions. [2022-11-18 19:48:02,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 19:48:02,920 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 16 states have internal predecessors, (56), 9 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 158 [2022-11-18 19:48:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:48:02,922 INFO L225 Difference]: With dead ends: 349 [2022-11-18 19:48:02,922 INFO L226 Difference]: Without dead ends: 347 [2022-11-18 19:48:02,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-11-18 19:48:02,923 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 229 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 2010 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 2192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:48:02,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 497 Invalid, 2192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2010 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-18 19:48:02,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-18 19:48:02,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 320. [2022-11-18 19:48:02,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 239 states have (on average 1.0711297071129706) internal successors, (256), 241 states have internal predecessors, (256), 50 states have call successors, (50), 28 states have call predecessors, (50), 30 states have return successors, (58), 50 states have call predecessors, (58), 49 states have call successors, (58) [2022-11-18 19:48:02,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 364 transitions. [2022-11-18 19:48:02,984 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 364 transitions. Word has length 158 [2022-11-18 19:48:02,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:48:02,989 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 364 transitions. [2022-11-18 19:48:02,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 16 states have internal predecessors, (56), 9 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-18 19:48:02,989 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 364 transitions. [2022-11-18 19:48:02,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-18 19:48:02,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:48:02,991 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:48:02,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-18 19:48:02,991 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:48:02,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:48:02,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1935350012, now seen corresponding path program 1 times [2022-11-18 19:48:02,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:48:02,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952022326] [2022-11-18 19:48:02,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:02,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:48:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:48:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:48:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:48:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:48:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:48:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:48:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:48:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-18 19:48:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:48:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-18 19:48:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 19:48:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-18 19:48:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 19:48:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:48:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:48:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 19:48:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 19:48:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:04,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-18 19:48:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2022-11-18 19:48:05,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:48:05,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952022326] [2022-11-18 19:48:05,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952022326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:48:05,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452887085] [2022-11-18 19:48:05,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:05,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:05,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:48:05,011 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:48:05,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 19:48:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:05,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 2893 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-18 19:48:05,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:48:05,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:48:06,191 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:48:06,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 19:48:06,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 19:48:06,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 19:48:06,848 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:48:06,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-18 19:48:06,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-18 19:48:06,879 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:48:06,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-18 19:48:06,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-18 19:48:07,004 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:48:07,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-11-18 19:48:07,023 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:48:07,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2022-11-18 19:48:07,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:48:07,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:48:08,244 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2582 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_memcpy_impl_#in~dst.base| v_ArrVal_2582))) (exists ((v_ArrVal_2583 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_memcpy_impl_#in~dst.base| v_ArrVal_2583)))) is different from true [2022-11-18 19:48:08,276 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2583 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_my_memcpy_#in~dst.base| v_ArrVal_2583) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_2582 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.offset)| |c_my_memcpy_#in~dst.base| v_ArrVal_2582) |c_#memory_$Pointer$.offset|))) is different from true [2022-11-18 19:48:08,308 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 19:48:08,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-11-18 19:48:08,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:08,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-18 19:48:08,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:08,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-18 19:48:08,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:08,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-18 19:48:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 60 proven. 135 refuted. 0 times theorem prover too weak. 65 trivial. 1 not checked. [2022-11-18 19:48:09,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:48:09,658 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_aws_byte_buf_write_~buf.offset 8))) (and (forall ((v_ArrVal_2598 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_aws_byte_buf_write_#t~mem1163.base| v_ArrVal_2598) c_aws_byte_buf_write_~buf.base) .cse0) 0)) (forall ((v_ArrVal_2599 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_aws_byte_buf_write_#t~mem1163.base| v_ArrVal_2599) c_aws_byte_buf_write_~buf.base) .cse0) 0)))) is different from false [2022-11-18 19:48:09,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452887085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:48:09,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:48:09,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 32] total 42 [2022-11-18 19:48:09,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696973414] [2022-11-18 19:48:09,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:48:09,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-18 19:48:09,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:48:09,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-18 19:48:09,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1849, Unknown=3, NotChecked=264, Total=2256 [2022-11-18 19:48:09,662 INFO L87 Difference]: Start difference. First operand 320 states and 364 transitions. Second operand has 42 states, 38 states have (on average 4.368421052631579) internal successors, (166), 36 states have internal predecessors, (166), 15 states have call successors, (39), 11 states have call predecessors, (39), 11 states have return successors, (36), 13 states have call predecessors, (36), 15 states have call successors, (36) [2022-11-18 19:48:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:48:15,292 INFO L93 Difference]: Finished difference Result 487 states and 580 transitions. [2022-11-18 19:48:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-18 19:48:15,293 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 4.368421052631579) internal successors, (166), 36 states have internal predecessors, (166), 15 states have call successors, (39), 11 states have call predecessors, (39), 11 states have return successors, (36), 13 states have call predecessors, (36), 15 states have call successors, (36) Word has length 162 [2022-11-18 19:48:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:48:15,299 INFO L225 Difference]: With dead ends: 487 [2022-11-18 19:48:15,299 INFO L226 Difference]: Without dead ends: 361 [2022-11-18 19:48:15,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 182 SyntacticMatches, 10 SemanticMatches, 78 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=429, Invalid=5408, Unknown=27, NotChecked=456, Total=6320 [2022-11-18 19:48:15,301 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 296 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 3969 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1700 SdHoareTripleChecker+Invalid, 5871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 3969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1555 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:48:15,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1700 Invalid, 5871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 3969 Invalid, 0 Unknown, 1555 Unchecked, 3.5s Time] [2022-11-18 19:48:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-18 19:48:15,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 306. [2022-11-18 19:48:15,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 228 states have (on average 1.0701754385964912) internal successors, (244), 230 states have internal predecessors, (244), 48 states have call successors, (48), 28 states have call predecessors, (48), 29 states have return successors, (55), 47 states have call predecessors, (55), 47 states have call successors, (55) [2022-11-18 19:48:15,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 347 transitions. [2022-11-18 19:48:15,349 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 347 transitions. Word has length 162 [2022-11-18 19:48:15,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:48:15,350 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 347 transitions. [2022-11-18 19:48:15,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 4.368421052631579) internal successors, (166), 36 states have internal predecessors, (166), 15 states have call successors, (39), 11 states have call predecessors, (39), 11 states have return successors, (36), 13 states have call predecessors, (36), 15 states have call successors, (36) [2022-11-18 19:48:15,350 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 347 transitions. [2022-11-18 19:48:15,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-18 19:48:15,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:48:15,351 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:48:15,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 19:48:15,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-18 19:48:15,559 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:48:15,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:48:15,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1439333457, now seen corresponding path program 1 times [2022-11-18 19:48:15,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:48:15,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052334645] [2022-11-18 19:48:15,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:15,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:48:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:20,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:48:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:20,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:48:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:20,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:48:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:20,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:48:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:20,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:48:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:20,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:48:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:20,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:48:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:20,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-18 19:48:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:20,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:48:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:20,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-18 19:48:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:20,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-18 19:48:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:20,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-18 19:48:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:20,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 19:48:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:21,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:48:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:21,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:48:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:21,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 19:48:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:21,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 19:48:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:21,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-18 19:48:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-11-18 19:48:21,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:48:21,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052334645] [2022-11-18 19:48:21,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052334645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:48:21,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607984826] [2022-11-18 19:48:21,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:21,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:21,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:48:21,527 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:48:21,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 19:48:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:22,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 2907 conjuncts, 152 conjunts are in the unsatisfiable core [2022-11-18 19:48:22,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:48:22,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:48:22,516 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-18 19:48:22,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2022-11-18 19:48:22,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 19:48:22,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 19:48:23,584 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-18 19:48:23,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-11-18 19:48:23,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-18 19:48:23,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-18 19:48:35,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-18 19:48:35,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-18 19:48:35,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-18 19:48:35,594 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:48:35,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-18 19:48:37,608 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_43| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_43|) 8) |v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_43|))) is different from true [2022-11-18 19:49:41,885 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2767 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_memcpy_impl_#in~dst.base| v_ArrVal_2767))) is different from true [2022-11-18 19:49:41,900 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2767 (Array Int Int))) (= (store |c_old(#memory_int)| |c_my_memcpy_#in~dst.base| v_ArrVal_2767) |c_#memory_int|)) is different from true [2022-11-18 19:49:41,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:49:41,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-11-18 19:49:41,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-18 19:49:41,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:42,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 19:49:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 35 proven. 189 refuted. 1 times theorem prover too weak. 48 trivial. 4 not checked. [2022-11-18 19:49:46,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:47,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607984826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:47,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:49:47,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 44] total 64 [2022-11-18 19:49:47,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644760389] [2022-11-18 19:49:47,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:49:47,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-18 19:49:47,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:47,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-18 19:49:47,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=3986, Unknown=36, NotChecked=390, Total=4692 [2022-11-18 19:49:47,576 INFO L87 Difference]: Start difference. First operand 306 states and 347 transitions. Second operand has 64 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 52 states have internal predecessors, (167), 20 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2022-11-18 19:51:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:36,860 INFO L93 Difference]: Finished difference Result 465 states and 527 transitions. [2022-11-18 19:51:36,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-18 19:51:36,860 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 52 states have internal predecessors, (167), 20 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) Word has length 168 [2022-11-18 19:51:36,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:36,862 INFO L225 Difference]: With dead ends: 465 [2022-11-18 19:51:36,862 INFO L226 Difference]: Without dead ends: 343 [2022-11-18 19:51:36,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 186 SyntacticMatches, 16 SemanticMatches, 112 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3998 ImplicationChecksByTransitivity, 190.9s TimeCoverageRelationStatistics Valid=896, Invalid=11187, Unknown=139, NotChecked=660, Total=12882 [2022-11-18 19:51:36,865 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 356 mSDsluCounter, 1772 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 1860 SdHoareTripleChecker+Invalid, 5926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2911 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:36,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 1860 Invalid, 5926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 2789 Invalid, 0 Unknown, 2911 Unchecked, 2.7s Time] [2022-11-18 19:51:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-18 19:51:36,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 331. [2022-11-18 19:51:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 253 states have (on average 1.0632411067193677) internal successors, (269), 256 states have internal predecessors, (269), 46 states have call successors, (46), 29 states have call predecessors, (46), 31 states have return successors, (51), 45 states have call predecessors, (51), 45 states have call successors, (51) [2022-11-18 19:51:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 366 transitions. [2022-11-18 19:51:36,922 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 366 transitions. Word has length 168 [2022-11-18 19:51:36,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:36,923 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 366 transitions. [2022-11-18 19:51:36,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 52 states have internal predecessors, (167), 20 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2022-11-18 19:51:36,923 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 366 transitions. [2022-11-18 19:51:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-18 19:51:36,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:36,925 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:36,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:37,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-18 19:51:37,137 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:37,138 INFO L85 PathProgramCache]: Analyzing trace with hash 376513426, now seen corresponding path program 1 times [2022-11-18 19:51:37,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:37,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092831885] [2022-11-18 19:51:37,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:37,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:40,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:51:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:51:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 19:51:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:51:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:51:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:51:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 19:51:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 19:51:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 19:51:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-18 19:51:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-18 19:51:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-18 19:51:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:51:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:51:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 19:51:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 19:51:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-18 19:51:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 66 proven. 8 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2022-11-18 19:51:42,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:42,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092831885] [2022-11-18 19:51:42,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092831885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:42,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8294872] [2022-11-18 19:51:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:42,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:42,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:42,319 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:51:42,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 19:51:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 2844 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-18 19:51:43,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:43,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:51:43,367 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:51:43,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 19:51:43,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 19:51:45,491 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_write_u8_harness_~#buf~3#1.base_BEFORE_CALL_76| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_write_u8_harness_~#buf~3#1.base_BEFORE_CALL_76| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_write_u8_harness_~#buf~3#1.base_BEFORE_CALL_76|) 8)))) is different from true [2022-11-18 19:51:47,619 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_write_u8_harness_~#buf~3#1.base_BEFORE_CALL_77| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_write_u8_harness_~#buf~3#1.base_BEFORE_CALL_77| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_write_u8_harness_~#buf~3#1.base_BEFORE_CALL_77|) 8)))) is different from true [2022-11-18 19:51:47,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:47,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-18 19:51:49,734 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_46| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_46| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_46|) 8)))) is different from true [2022-11-18 19:51:51,797 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_47| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_47|) 8) |v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_47|))) is different from true [2022-11-18 19:51:53,893 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_82 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_82) 8) v_aws_byte_buf_write_~buf.base_BEFORE_CALL_82))) is different from true [2022-11-18 19:51:56,028 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_83 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_83) 8) v_aws_byte_buf_write_~buf.base_BEFORE_CALL_83))) is different from true [2022-11-18 19:51:58,126 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_84 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_84) 8) v_aws_byte_buf_write_~buf.base_BEFORE_CALL_84))) is different from true [2022-11-18 19:51:58,643 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2901 (Array Int Int))) (= (store |c_old(#memory_int)| |c_memcpy_impl_#in~dst.base| v_ArrVal_2901) |c_#memory_int|)) is different from true [2022-11-18 19:51:58,660 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2901 (Array Int Int))) (= (store |c_old(#memory_int)| |c_my_memcpy_#in~dst.base| v_ArrVal_2901) |c_#memory_int|)) is different from true [2022-11-18 19:51:58,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:51:58,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-11-18 19:51:58,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-18 19:51:58,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:58,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:51:58,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2022-11-18 19:52:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 16 proven. 16 refuted. 48 times theorem prover too weak. 24 trivial. 137 not checked. [2022-11-18 19:52:03,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:52:04,642 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2909 (Array Int Int))) (not (let ((.cse0 (select (store |c_#memory_int| |c_aws_byte_buf_write_#t~mem1163.base| v_ArrVal_2909) c_aws_byte_buf_write_~buf.base))) (< (mod (select .cse0 (+ c_aws_byte_buf_write_~buf.offset 16)) 18446744073709551616) (mod (+ c_aws_byte_buf_write_~len (select .cse0 c_aws_byte_buf_write_~buf.offset)) 18446744073709551616))))) is different from false [2022-11-18 19:52:04,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8294872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:52:04,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:52:04,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 34] total 56 [2022-11-18 19:52:04,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132352634] [2022-11-18 19:52:04,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:52:04,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 19:52:04,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:04,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 19:52:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2584, Unknown=15, NotChecked=1110, Total=3906 [2022-11-18 19:52:04,647 INFO L87 Difference]: Start difference. First operand 331 states and 366 transitions. Second operand has 56 states, 49 states have (on average 3.795918367346939) internal successors, (186), 46 states have internal predecessors, (186), 17 states have call successors, (32), 17 states have call predecessors, (32), 18 states have return successors, (30), 16 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-18 19:55:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:55:01,362 INFO L93 Difference]: Finished difference Result 528 states and 591 transitions. [2022-11-18 19:55:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-18 19:55:01,362 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 49 states have (on average 3.795918367346939) internal successors, (186), 46 states have internal predecessors, (186), 17 states have call successors, (32), 17 states have call predecessors, (32), 18 states have return successors, (30), 16 states have call predecessors, (30), 16 states have call successors, (30) Word has length 161 [2022-11-18 19:55:01,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:55:01,364 INFO L225 Difference]: With dead ends: 528 [2022-11-18 19:55:01,364 INFO L226 Difference]: Without dead ends: 444 [2022-11-18 19:55:01,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 175 SyntacticMatches, 17 SemanticMatches, 94 ConstructedPredicates, 10 IntricatePredicates, 1 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 195.0s TimeCoverageRelationStatistics Valid=557, Invalid=6654, Unknown=139, NotChecked=1770, Total=9120 [2022-11-18 19:55:01,365 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 204 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 3130 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 5844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 3130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2571 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:55:01,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 1181 Invalid, 5844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 3130 Invalid, 0 Unknown, 2571 Unchecked, 2.8s Time] [2022-11-18 19:55:01,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-11-18 19:55:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 421. [2022-11-18 19:55:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 324 states have (on average 1.0524691358024691) internal successors, (341), 329 states have internal predecessors, (341), 58 states have call successors, (58), 35 states have call predecessors, (58), 38 states have return successors, (64), 56 states have call predecessors, (64), 57 states have call successors, (64) [2022-11-18 19:55:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 463 transitions. [2022-11-18 19:55:01,446 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 463 transitions. Word has length 161 [2022-11-18 19:55:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:55:01,446 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 463 transitions. [2022-11-18 19:55:01,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 49 states have (on average 3.795918367346939) internal successors, (186), 46 states have internal predecessors, (186), 17 states have call successors, (32), 17 states have call predecessors, (32), 18 states have return successors, (30), 16 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-18 19:55:01,447 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 463 transitions. [2022-11-18 19:55:01,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-18 19:55:01,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:55:01,449 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:55:01,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 19:55:01,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-18 19:55:01,660 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:55:01,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:55:01,660 INFO L85 PathProgramCache]: Analyzing trace with hash 917790060, now seen corresponding path program 1 times [2022-11-18 19:55:01,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:55:01,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454219725] [2022-11-18 19:55:01,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:55:01,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:55:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:06,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 19:55:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:06,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 19:55:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:06,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-18 19:55:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:06,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 19:55:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:06,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:55:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:06,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-18 19:55:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:06,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 19:55:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:06,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-18 19:55:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:06,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-18 19:55:06,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:06,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 19:55:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:06,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-18 19:55:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:06,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-11-18 19:55:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:06,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-18 19:55:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:07,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:55:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:08,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 19:55:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:09,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 19:55:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:09,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 19:55:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:09,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-18 19:55:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 78 proven. 21 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-18 19:55:09,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:55:09,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454219725] [2022-11-18 19:55:09,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454219725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:55:09,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625966752] [2022-11-18 19:55:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:55:09,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:55:09,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:55:09,630 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:55:09,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c34e5d63-26d9-48ba-bfc0-2c7850356347/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 19:55:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:10,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 2857 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-18 19:55:10,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:55:10,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:55:10,921 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:55:10,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 19:55:10,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 19:55:12,944 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_write_u8_harness_~#buf~3#1.base_BEFORE_CALL_82| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_write_u8_harness_~#buf~3#1.base_BEFORE_CALL_82| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_write_u8_harness_~#buf~3#1.base_BEFORE_CALL_82|) 8)))) is different from true [2022-11-18 19:55:14,998 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_write_u8_harness_~#buf~3#1.base_BEFORE_CALL_83| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_write_u8_harness_~#buf~3#1.base_BEFORE_CALL_83| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_write_u8_harness_~#buf~3#1.base_BEFORE_CALL_83|) 8)))) is different from true [2022-11-18 19:55:15,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:15,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-18 19:55:17,122 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_49| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_49|) 8) |v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_49|))) is different from true [2022-11-18 19:55:19,272 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_50| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_50|) 8) |v_ULTIMATE.start_aws_byte_buf_write_u8_~buf#1.base_BEFORE_CALL_50|))) is different from true [2022-11-18 19:55:21,529 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_88 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_88) 8) v_aws_byte_buf_write_~buf.base_BEFORE_CALL_88))) is different from true [2022-11-18 19:55:23,681 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_89 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_89) 8) v_aws_byte_buf_write_~buf.base_BEFORE_CALL_89))) is different from true [2022-11-18 19:55:25,800 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_90 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_90) 8) v_aws_byte_buf_write_~buf.base_BEFORE_CALL_90))) is different from true [2022-11-18 19:55:26,465 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3035 (Array Int Int))) (= (store |c_old(#memory_int)| |c_memcpy_impl_#in~dst.base| v_ArrVal_3035) |c_#memory_int|)) is different from true [2022-11-18 19:55:26,479 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3035 (Array Int Int))) (= (store |c_old(#memory_int)| |c_my_memcpy_#in~dst.base| v_ArrVal_3035) |c_#memory_int|)) is different from true [2022-11-18 19:55:26,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:55:26,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-11-18 19:55:26,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-18 19:55:26,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:26,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:55:26,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2022-11-18 19:55:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 16 proven. 16 refuted. 48 times theorem prover too weak. 24 trivial. 137 not checked. [2022-11-18 19:55:38,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:55:39,025 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3043 (Array Int Int))) (not (let ((.cse0 (select (store |c_#memory_int| |c_aws_byte_buf_write_#t~mem1163.base| v_ArrVal_3043) c_aws_byte_buf_write_~buf.base))) (< (mod (select .cse0 (+ c_aws_byte_buf_write_~buf.offset 16)) 18446744073709551616) (mod (+ c_aws_byte_buf_write_~len (select .cse0 c_aws_byte_buf_write_~buf.offset)) 18446744073709551616))))) is different from false [2022-11-18 19:55:39,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625966752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:55:39,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:55:39,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34] total 65 [2022-11-18 19:55:39,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789655448] [2022-11-18 19:55:39,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:55:39,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-18 19:55:39,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:55:39,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-18 19:55:39,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=3551, Unknown=29, NotChecked=1290, Total=5112 [2022-11-18 19:55:39,030 INFO L87 Difference]: Start difference. First operand 421 states and 463 transitions. Second operand has 65 states, 57 states have (on average 3.43859649122807) internal successors, (196), 55 states have internal predecessors, (196), 21 states have call successors, (38), 18 states have call predecessors, (38), 18 states have return successors, (34), 18 states have call predecessors, (34), 20 states have call successors, (34)